Updated on 2024/12/06

Information

 

写真a

 
SAKAGUCHI HIDETSUGU
 
Organization
Faculty of Engineering Sciences Department of Advanced Energy Science and Engineering Associate Professor
School of Interdisciplinary Science and Innovation Department of Interdisciplinary Science and Innovation（Concurrent）
Interdisciplinary Graduate School of Engineering Sciences Department of Interdisciplinary Engineering Sciences（Concurrent）
Title
Associate Professor
Contact information
メールアドレス
Tel
0925838837
Profile
研究活動概要 主に、大自由度の非線形ダイナミクスの研究をおこなっている。 リミットサイクル振動子が相互作用すると、互いの振動数をそろえる引き込み現象がおこる。多数のリミットサイクル振動子が相互作用しあっている系に生じるマクロな引き込み現象を計算機シミュレーションを用いて解析してきた。統計力学でよく知られた相転移現象に似た協力現象が起こり、各振動子がばらばらに振動している状態から、マクロな数の振動子の振動数がそろった振動数凝縮相に遷移する。また、空間的に広がった系では、系のパラメ−タを上げていくと、一様な状態から、空間的に周期的なパタ−ンが生じ、さらにパラメ−タをあげると、さまざまな状態を通って時空カオス状態に遷移する。この遷移の過程を、系の詳細によらず理解するために、ギンツブルグーランダウタイプの振幅方程式を用いて研究してきた。特に周期パタ−ンが位相変調に対して不安定化したあとの振る舞いを詳しく解析し、位相記述の破綻から欠陥をふくむパタ−ンに移行することを示した。 そのほか、神経回路網や生態系、進化のような生物系を互いに相互作用しあっている多体系と見なし、その動的な振る舞いを調べている。 教育活動 大学１年生の力学同演習を担当 大学１，２年生の基礎物理学実験、コア科目「物質の世界」 大学院で応用数学、非線形物性学、量子物性学基礎などの講義を担当している。
Homepage
External link

Degree

  • Doctor of Science

Research Interests・Research Keywords

  • Research theme： Spin-orbit coupling and Bose-Einstein condensates

    Keyword： spin-orbit coupling, Bose-Einstein condensates, vortex soliton

    Research period： 2018.4 - 2020.3

  • Research theme： Self-organization in systems with long-range interaction

    Keyword： collective dynamics elastic interaction

    Research period： 2013.4 - 2014.4

  • Research theme： Dynamics of branching and hierarchical structures

    Keyword： branching structure, hierarchical structure

    Research period： 2010.4 - 2012.4

  • Research theme： Pattern formation and control in reaction-diffusion systems

    Keyword： reaction diffusion systems, pattern formation, control

    Research period： 2007.4 - 2010.3

  • Research theme： 非線形シュレディンガー方程式のソリトンの運動

    Keyword： ソリトン　ボーズ凝縮

    Research period： 2003.1 - 2007.12

  • Research theme： ラチェットモデルなどの確率モデルの研究

    Keyword： ファインマンラチェット、乗法的雑音

    Research period： 1998.1 - 2007.12

  • Research theme： 結晶成長のモデルシミュレーション

    Keyword： phase field model, coupled map lattice

    Research period： 1997.1 - 2007.12

  • Research theme： 複素ギンツブルグ−ランダウ方程式のシミュレーション

    Keyword： Complex Ginzburg-Landau equation, spatio-temporal chaos

    Research period： 1990.1 - 2007.12

  • Research theme： 振動子集団の同期現象および確率共鳴現象

    Keyword： limit cycle oscillator, synchronizatio, stochastic resonance

    Research period： 1986.4 - 2007.12

Awards

  • 150 outstanding referees of the Physical Review Journals in 2017

    2017.3   Americal Physical Society   The highly selective Outstanding Referee program annually recognizes about 150 of the roughly 67,000 currently active referees.

    　More details

    アメリカ物理学会のPhysical Review誌のレフェリー150人を表彰する賞を受賞した。

  • 応用物理学会論文賞

    2014.9   応用物理学会   Epitaxial Growth and Electronic Properties of Large Hexagonal Graphene Domains on Cu(111) Thin Film Appl. Phys. Express 6 (2013) 075101

  • 日本物理学会論文賞

    1998.3   標　題：　Localized Oscillation in a Cellular Pattern 著　者：　坂口　英継 掲載誌：　Prog. Theor. Phys. 87 (1992) 1049-1053 受賞理由：　非線形非平衡パターン形成の研究はベロウソフ-ジャボチンスキー反応に代表される化学反応系やレイリー・ベルナール対流に代表される流体力学系などで議論されることが多い．これらの実験系では，制御パラメータを増大して行くと，複雑な分岐現象やいくつもの非平衡場が絡んで起こると思われる多彩な現象にしばしば遭遇する．このことを反映して，最近の研究動向としては，縮退した分岐現象や複数の非平衡場の相互作用などから生じる新しいタイプの散逸構造の発見に関心が向けられている．本論文もこの流れに沿っており，自励振動と空間的周期構造という2種類の連続対称性の破れが共存する場合が議論されている．具体的には，それぞれに付随する2種類の位相場の相互作用による不安定性の結果として，波の発信源となる局在した標的パターンが出現することを厳密に導いた． 　本論文は，非線形散逸場における新しいタイプの散逸構造出現の可能性をモデル発展方程式の厳密解として示しただけでなく，液晶のグリッドパターンを伴う電気流体力学的対流現象や空間的周期構造を伴うある種の化学反応において適当な制御パラメータを増すと出現するものとして，従来から実験的に知られていた局在標的パターンの理論的説明を与えた点で，優れた論文として評価される．

Papers

  • Rotating nonlinear states in trapped binary Bose-Einstein condensates under the action of the spin-orbit coupling

    Sakaguchi, H; Malomed, BA

    PHYSICA SCRIPTA   99 ( 12 )   2024.12   （ ISSN:0031-8949 eISSN:1402-4896 ）

    　More details

    Publisher：Physica Scripta  

    We report results of systematic analysis of confined steadily rotating patterns in the two-component BEC including the spin-orbit coupling (SOC) of the Rashba type, which acts in the interplay with the attractive or repulsive intra-component and inter-component nonlinear interactions and confining potential. The analysis is based on the system of the Gross-Pitaevskii equations (GPEs) written in the rotating coordinates. The resulting GPE system includes effective Zeeman splitting. In the case of the attractive nonlinearity, the analysis, performed by means of the imaginary-time simulations, produces deformation of the known two-dimensional SOC solitons (semi-vortices and mixed-modes). Essentially novel findings are reported in the case of the repulsive nonlinearity. They demonstrate patterns arranged as chains of unitary vortices which, at smaller values of the rotation velocity Ω, assume the straight (single-string) form. At larger Ω, the straight chains become unstable, being spontaneously replaced by a trilete star-shaped array of vortices. At still larger values of Ω, the trilete pattern rebuilds itself into a star-shaped one formed of five and, then, seven strings. The transitions between the different patterns are accounted for by comparison of their energy. It is shown that the straight chains of vortices, which form the star-shaped structures, are aligned with boundaries between domains populated by plane waves with different wave vectors. A transition from an axisymmetric higher-order (multiple) vortex state to the trilete pattern is investigated too.

    DOI： 10.1088/1402-4896/ad9229

    Web of Science

    Scopus

  • Two-dimensional solitons in second-harmonic-generating media with fractional diffraction

    Sakaguchi, H; Malomed, BA

    PHYSICA D-NONLINEAR PHENOMENA   467   2024.11   （ ISSN:0167-2789 eISSN:1872-8022 ）

    　More details

    Publisher：Physica D: Nonlinear Phenomena  

    We introduce a system of propagation equations for the fundamental-frequency (FF) and second-harmonic (SH) waves in the bulk waveguide with the effective fractional diffraction and quadratic (χ(2)) nonlinearity. The numerical solution produces families of ground-state (zero-vorticity) two-dimensional solitons in the free space, which are stable in exact agreement with the Vakhitov–Kolokolov criterion, while vortex solitons are completely unstable in that case. Mobility of the stable solitons and inelastic collisions between them are briefly considered too. In the presence of a harmonic-oscillator (HO) trapping potential, families of partially stable single- and two-color solitons (SH-only or FF-SH ones, respectively) are obtained, with zero and nonzero vorticities. The single- and two-color solitons are linked by a bifurcation which takes place with the increase of the soliton's power.

    DOI： 10.1016/j.physd.2024.134242

    Web of Science

    Scopus

  • Machine Learning of Nonlinear Dynamical Systems with Control Parameters Using Feedforward Neural Networks

    Sakaguchi, H

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   93 ( 10 )   2024.10   （ ISSN:0031-9015 ）

    　More details

    Publisher：Journal of the Physical Society of Japan  

    Several authors have reported that the echo state network reproduces bifurcation diagrams of some nonlinear differential equations using the data for a few control parameters. We demonstrate that a simpler feedforward neural network can also reproduce the bifurcation diagram of the logistics map and synchronization transition in globally coupled Stuart–Landau equations.

    DOI： 10.7566/JPSJ.93.105001

    Web of Science

    Scopus

  • Nonequilibrium dynamics of coupled oscillators under the shear-velocity boundary condition

    Sakaguchi, H

    PHYSICAL REVIEW E   110 ( 3 )   034124   2024.9   （ ISSN:2470-0045 eISSN:2470-0053 ）

    　More details

    Language：English   Publisher：Physical Review E  

    Deterministic and stochastic coupled oscillators with inertia are studied on the rectangular lattice under the shear-velocity boundary condition. Our coupled oscillator model exhibits various nontrivial phenomena and there are various relationships with wide research areas such as the coupled limit-cycle oscillators, the dislocation theory, a block-spring model of earthquakes, and the nonequilibrium molecular dynamics. We show numerically several unique nonequilibrium properties of the coupled oscillators. We find that the spatial profiles of the average value and variance of the velocity become nonuniform when the dissipation rate is large. The probability distribution of the velocity sometimes deviates from the Gaussian distribution. The time evolution of kinetic energy becomes intermittent when the shear rate is small and the temperature is small but not zero. The intermittent jumps of the kinetic energy cause a long tail in the velocity distribution.

    DOI： 10.1103/PhysRevE.110.034124

    Web of Science

    Scopus

    PubMed

  • Repetitive Infection Spreading and Directed Evolution in the Susceptible-Infected-Recovered-Susceptible Model

    Sakaguchi, H; Yamasaki, K

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   93 ( 5 )   2024.5   （ ISSN:0031-9015 ）

    　More details

    Publisher：Journal of the Physical Society of Japan  

    We study two simple mathematical models of an epidemic. First, we study the repetitive infection spreading in a simplified susceptible–infected–recovered–susceptible (SIRS) model including the effect of the decay of the acquired immunity. The model is an intermediate of the SIRS model including the recruitment and death terms and the SIR model in which the recovered population is assumed to be never infected again. When the decay rate δ of the acquired immunity is sufficiently low, multiple infection spreading occurs in spikes. The model equation can be reduced to a map when the decay rate δ is sufficiently low, and the spike-like multiple infection spreading is reproduced in the mapping. The period-doubling bifurcation and chaos are found in the simplified SIRS model with seasonal variations. The nonlinear phenomena are reproduced using the map. Next, we study coupled SIRS equations for the directed evolution where the mutation is expressed with a diffusion-type term. A type of reaction–diffusion equation is derived by the continuum approximation for the infected population I. The reaction–diffusion equation with the linear dependence of infection rate on the type space has an exact Gaussian solution with a time-dependent average and variance. The propagation of the Gaussian pulse corresponds to the successive transitions of the dominant variant.

    DOI： 10.7566/JPSJ.93.054801

    Web of Science

    Scopus

  • Noise-induced excitation wave and its size distribution in coupled FitzHugh-Nagumo equations on a square lattice

    Sakaguchi, H

    PHYSICAL REVIEW E   109 ( 4 )   044211   2024.4   （ ISSN:2470-0045 eISSN:2470-0053 ）

    　More details

    Language：English   Publisher：Physical Review E  

    There are various research topics such as stochastic resonance, coherent resonance, and neuroavalanche in excitable systems under external noises. We perform numerical simulation of coupled noisy FitzHugh-Nagumo equations on the square lattice. Excitation waves are generated most efficiently at an intermediate noise strength. The cluster size distributions obey a power-law-like distribution at a certain parameter range. However, we consider that this is not a self-organized critical phenomenon, partly because the exponent of the power law is not constant. We have studied the propagation of excitation waves in the coupled noisy FitzHugh-Nagumo equations with a one-dimensional pacemaker region and found that there is a phase-transition-like phenomenon from the short-range propagation to the whole-system propagation by changing the noise strength T. The power-law distribution is observed most clearly near the phase transition of the propagation of excitation waves in the coupled noisy FitzHugh-Nagumo equations without the one-dimensional pacemaker.

    DOI： 10.1103/PhysRevE.109.044211

    Web of Science

    Scopus

    PubMed

  • Transition of the Bifurcations in the Rotation of a Camphor-Coated Elliptical Paper Disk

    Shimokawa, M; Arimitsu, J; Kitahata, H; Sakaguchi, H

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   93 ( 3 )   2024.3   （ ISSN:0031-9015 ）

    　More details

    Publisher：Journal of the Physical Society of Japan  

    An elliptical camphor-coated paper disk whose center of mass is fixed at the rotational axis rotates spontaneously with a constant angular velocity when placed on the surface of water. In our experiments, we observed bifurcation by controlling the water depth, i.e., the disk rotated and was stationary at higher and lower water depths, respectively. Further, the bifurcation type depended on the aspect ratio of the elliptical camphor disk; subcritical and supercritical bifurcations were observed in the high- and low-aspect-ratio experiments, respectively. Thus, the experiments and phenomenological models indicated that the friction between the acrylic rod as the rotational axis and the center pore of the disk penetrated by the rod determined the bifurcation type.

    DOI： 10.7566/JPSJ.93.034002

    Web of Science

    Scopus

  • Angular-Momentum Modes in a Bosonic Condensate Trapped in the Inverse-Square Potential

    Sakaguchi, H; Malomed, BA

    SYMMETRY-BASEL   15 ( 11 )   2023.11   （ eISSN:2073-8994 ）

    　More details

    Publisher：Symmetry  

    In the mean-field approximation, the well-known effect of the critical quantum collapse in a 3D gas of particles pulled to the center by potential (Formula presented.) is suppressed by repulsive inter-particle interactions, which create the otherwise non-existing s-wave ground state. Here, we address excited bound states carrying angular momentum, with the orbital and magnetic quantum numbers l and m. They exist above a threshold value of the potential’s strength, (Formula presented.). The sectoral, tesseral, and zonal modes, which correspond to (Formula presented.), (Formula presented.), and (Formula presented.), respectively, are found in an approximate analytical form for relatively small values of (Formula presented.). Explicit results are produced for the p- and d-wave states, with (Formula presented.) and 2, respectively. In the general form, the bound states are obtained numerically, confirming the accuracy of the analytical approximation.

    DOI： 10.3390/sym15112060

    Web of Science

    Scopus

  • Second-harmoni generation in the system with fractional diffraction Reviewed International journal

    P.Li, H.Sakaguchi, L.Zeng, X. Zhu, D.Mihalache, B.Malomed

    Chaos, Solitons, and Fractals   2023.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Second-harmonic generation in the system with fractional diffraction

    Li, PF; Sakaguchi, H; Zeng, LW; Zhu, X; Mihalache, D; Malomed, BA

    CHAOS SOLITONS & FRACTALS   173   2023.8   （ ISSN:0960-0779 eISSN:1873-2887 ）

    　More details

    Publisher：Chaos, Solitons and Fractals  

    We construct a family of bright optical solitons composed of fundamental-frequency (FF) and second-harmonic (SH) components in the one-dimensional (planar) waveguide with the quadratic (second-harmonic-generating) nonlinearity and effective fractional diffraction, characterized by the Lévy index α, taking values between 2 and 0.5, which correspond to the non-fractional diffraction and critical collapse, respectively. The existence domain and stability boundary for the solitons are delineated in the space of α, FF-SH mismatch parameter, and propagation constant. The stability boundary is tantamount to that predicted by the Vakhitov–Kolokolov criterion, while unstable solitons spontaneously evolve into localized breathers. A sufficiently weak transverse kick applied to the stable solitons excite small internal vibrations in the stable solitons, without setting them in motion. A stronger kick makes the solitons’ trajectories tilted, simultaneously destabilizing the solitons.

    DOI： 10.1016/j.chaos.2023.113701

    Web of Science

    Scopus

  • Suppression and frequency control of repetitive spiking in the FitzHugh-Nagumo model

    Sakaguchi, H; Yamasaki, K

    PHYSICAL REVIEW E   108 ( 1 )   014207   2023.7   （ ISSN:2470-0045 eISSN:2470-0053 ）

    　More details

    Language：English   Publisher：Physical Review E  

    The FitzHugh-Nagumo equation is a simple model equation that exhibits spiking. The output signal of a neuron is represented in the spiking frequency or firing rate. We consider a few control methods for spiking from the viewpoint of nonlinear dynamics. The repetitive spiking can be suppressed in the FitzHugh-Nagumo model by the periodic sinusoidal force with high frequency. We study the transition to the suppressed state numerically and perform a linear stability analysis to understand the suppression of the spiking. Next, we study coupled FitzHugh-Nagumo equations. We find that the periodic forcing makes the system chaotic, and the desynchronization induced by chaos weakens the total output of spiking in a certain parameter range. Finally, we propose a method of feedback control for the spiking frequency. We can get the desired spiking and bursting frequency using this feedback control. The feedback control method is analyzed using a mapping for the input.

    DOI： 10.1103/PhysRevE.108.014207

    Web of Science

    Scopus

    PubMed

  • Suppression and frequency control of repetitive spiking in the FitzHugh-Nagumo model Reviewed International journal

    H.Sakaguchi, K.Yamasaki

    Physical Review E   2023.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex motion and nonlinear response in coupled noisy phase oscillator lattices under shear stress Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   2022.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex motion and nonlinear response in coupled noisy phase oscillator lattices under shear stress

    Sakaguchi, H

    PHYSICAL REVIEW E   106 ( 5 )   054154   2022.11   （ ISSN:2470-0045 eISSN:2470-0053 ）

    　More details

    Language：English   Publisher：Physical Review E  

    Vortex motion in coupled phase oscillator lattices is analogous to the dislocation motion in crystals. A single vortex exhibits a glide motion by force at the boundaries. Thermal fluctuations induce the glide motion even below the critical point corresponding to the Peierls stress. The random drift motion is approximated as a random walk in a tilted potential. If the temperature is high, vortices are spontaneously generated. A nonlinear response where the frequency profile is relatively flat in the central region and changes sharply near the boundaries is observed when the vortex density becomes large and nonuniform.

    DOI： 10.1103/PhysRevE.106.054154

    Web of Science

    Scopus

    PubMed

  • One- and two-dimensional solitons in spin-orbit-coupled Bose-Einstein condensates with fractional kinetic energy

    Sakaguchi, H; Malomed, BA

    JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS   55 ( 15 )   2022.8   （ ISSN:0953-4075 eISSN:1361-6455 ）

    　More details

    Publisher：Journal of Physics B: Atomic, Molecular and Optical Physics  

    We address effects of spin-orbit coupling (SOC), phenomenologically added to a two-component Bose-Einstein condensate composed of particles moving by Lévy flights, in one- and two-dimensional (1D) and (2D) settings. The corresponding system of coupled Gross-Pitaevskii equations includes fractional kinetic-energy operators, characterized by the Lévy index, α < 2 (the normal kinetic energy corresponds to α = 2). The SOC terms, with strength λ, produce strong effects in the 2D case: they create families of stable solitons of the semi-vortex and mixed-mode types in the interval of 1 < α < 2, where the supercritical collapse does not admit the existence of stable solitons in the absence of the SOC. At λ → 0, amplitudes of these solitons vanish 1/4λ 1/(α-1).

    DOI： 10.1088/1361-6455/ac7685

    Web of Science

    Scopus

  • Hula-Hoop-Like Motion and Subcritical Bifurcation of the Rotation of an Elliptical Paper Disk Coated with Camphor

    Shimokawa, M; Sakaguchi, H

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   91 ( 7 )   2022.7   （ ISSN:0031-9015 ）

    　More details

    Publisher：Journal of the Physical Society of Japan  

    When an elliptical camphor-coated paper disk, with the center of mass fixed at the axis of rotation, is placed on the surface of water, it rotates spontaneously with a constant angular velocity. In experiments involving different water depths, we found that a subcritical bifurcation occurs; i.e., the camphor-coated disk remains at rest when the water depth is shallow, rotates when sufficiently deep, and exists in both the rotational and rest states at the intermediate depth. The camphor-coated disk exhibits a hula-hoop-like motion as it rotates. We propose a phenomenological model of this phenomenon that includes the effect of friction at the rotation axis. The model produces behaviors similar to the experimental results, such as the hula-hoop-like motion of the camphor-coated disk and the subcritical bifurcation. These results show that the friction is important for the emergence of both the subcritical bifurcation and the hula-hoop-like motion.

    DOI： 10.7566/JPSJ.91.074002

    Web of Science

    Scopus

  • Hula-Hoop-Like Motion and Subcritical Bifurcation of the Rotation of an Elliptical Paper Disk Coated with Camphor Reviewed

    Michiko Shimokawa, Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   2022.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • One- and two-dimensional solitons in spin-orbit-coupled Bose-Einstein condensates with fractional kinetic energy Reviewed International journal

    Hidetsugu Sakaguchi, Boris Malomed

    Journal of Physics B   2022.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex motions in coupled phase oscillator lattices with inertia under shear stress

    Sakaguchi, H

    PHYSICAL REVIEW E   105 ( 5 )   054211   2022.5   （ ISSN:2470-0045 eISSN:2470-0053 ）

    　More details

    Language：English   Publisher：Physical Review E  

    We propose a coupled phase oscillator model with inertia and study the vortex motion in the model when the external force is applied at the boundaries. The vortex exhibits a glide motion when the external force is larger than a critical value. We find a transition from the pair annihilation to passing for the collision of the vortex and antivortex when the external force is changed. In the parameter range of the passing, a single vortex exhibits a reciprocal motion, which leads to desynchronization. When the external force is further increased, the multiplication of vortices occurs and the jump of the frequency profile increases. The desynchronization induced by the vortex motion is analogous to the plastic flow induced by the dislocation motion under the shear stress in solids. In perfect crystals without dislocations, the plastic flow hardly occurs. We further show that a vortex ring is generated when a vortex line passes through an impurity region, which corresponds to the Orowan loop in the theory of plasticity.

    DOI： 10.1103/PhysRevE.105.054211

    Web of Science

    Scopus

    PubMed

  • Vortex motions in coupled phase oscillator lattices with inertia under shear stress Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   2022.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Observation and a simple model for plumose pattern on fracture surfaces of drying pastes Reviewed International journal

    Hidetsugu Sakaguchi, Kazuki Yamada, Michiko Shimokawa

    EPL   2022.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Observation and a simple model of plumose pattern on fracture surfaces of drying pastes

    Sakaguchi, H; Yamada, K; Shimokawa, M

    EPL   138 ( 1 )   2022.4   （ ISSN:0295-5075 eISSN:1286-4854 ）

    　More details

    Publisher：EPL  

    Plumose pattern often appears on the fracture surface of drying pastes. We show a few experimental results of the crack propagation in the drying pastes. We find that the crack propagation sometimes exhibits jump motions. We have also performed an experiment of the crack propagation in a tilted container where the crack propagates from the deeper to shallower sides. This experimental result suggests the importance of the movement of water content. We propose a simple coupled map lattice model. In the numerical simulation, a plumose-like pattern appears owing to the instability of the flat surface of the fracture. The numerical simulation reproduces the jump motions in the crack propagation. We have performed another experiment where a vertical streak pattern appears when the crack propagates downward by cutting into the top surface of the drying paste. ©

    DOI： 10.1209/0295-5075/ac61b0

    Web of Science

    Scopus

  • Solitary Wave States Maintained by Stochastic Direction Changes in a Population of Self-Propelled Particles

    Ishibashi, K; Sakaguchi, H

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   91 ( 3 )   2022.3   （ ISSN:0031-9015 ）

    　More details

    Publisher：Journal of the Physical Society of Japan  

    We study solitary wave states of self-propelled particles in the Ising-type Vicsek model. A strongly localized state appears after the rapid direction change of collective motion in the one-dimensional Ising-type Vicsek model. It is shown that this phenomenon occurs by the nucleation of a small population moving in the opposite direction and the subsequent sweeping-up process. This formation mechanism of the solitary wave state is different from the motility-induced phase separation. The solitary wave states maintained by stochastic direction changes also appear on triangular and square lattices in two dimensions.

    DOI： 10.7566/JPSJ.91.034003

    Web of Science

    Scopus

  • Solitary Wave States Maintained by Stochastic Direction Changes in a Population of Self-Propelled Particles Reviewed

    Kazuya Ishibashi, Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   91 ( 3 )   034003   2022.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Dragging spin-orbit-coupled solitons by a moving optical lattice Reviewed International journal

    Hidetsugu Sakaguchi, Fumihide Hirano, Boris Malomed

    Journal of Physics B   54 ( 24 )   245301   2021.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Prediction Model for Approval Ratings of Governments Reviewed

    Hidetsugu Sakaguchi, Yoko Hamasaki

    89 ( 12 )   2021.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Star-shaped patterns caused by colloidal aggregation during the spreading process of a droplet Reviewed International journal

    Michiko Shimokawa, Hiroyuki Kitahata, Hidetsugu Sakaguchi

    EPL   132 ( 1 )   2021.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Localization and Damping of Macroscopic Oscillation in Coupled Gross-Piteevskii Equations without Self-interaction Reviewed

    H.Sakaguchi, F.Hirano

    Journal of the Physcial Society of Japan   90 ( 5 )   2021.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Slow decay of infection in the inhomogeneous susceptible-infected-recovered model Reviewed International journal

    Hidetsugu Sakaguchi, Yuta Nakao

    Physical Review E   103 ( 1 )   2021.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Gross-Pitaevskii-Poisoon model for an ultra cold plasma: Density waves and solions Reviewed International journal

    Hidetsugu Sakaguchi, Boris Malomed

    Physical Review Research   2 ( 3 )   2021.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Transmission Characteristics of Electrons in Graphen incident on Cantor-like Potential Reviewed International journal

    Taichi Ogawana, Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   90 ( 1 )   2021.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Symmetry breaking in two-component system with repulsive interactions and linear coupling Reviewed International journal

    Hidetsugu Sakaguchi, Boris Malomed

    Communications in Nonlinear Science and NUmerical Simulation   92   2021.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Singular solitons Reviewed International journal

    Hidetsugu Sakaguchi, Boris Malomed

    Physical Review E   101 ( 1 )   2020.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Flip motion of solitary wave in an Ising-type Vicsek model Reviewed International journal

    Hidetsugu Skaguchi, Kazuya Ishibashi

    Physical Review E   2019.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • A Simple Model of Cell Proliferation of Bacteria Using Min Oscillation Reviewed

    Hidsugu Sakaguchi, Yuka Kawasakai

    Journal of the Physical Society of Japan   2019.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Soliton lattices in the Gross-Pitaevskii equation with nonlocal and repulsive coupling Reviewed International journal

    Hidetsugu Sakaguchi

    Physics Letters   2019.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Nonlinear Management of Topological Solitons in a Spin-Orbit-Coupled System Reviewed International journal

    Hidetsugu Sakaguchi, Boris Malomed

    Symmetry   2019.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Interaction of solitons with positive and negative masses: Shuttle motion and coacceleration Reviewed International journal

    Hidetsugu Sakaguchi, Boris MAlomed

    Physical Review E   2019.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Self-Organized Criticality of Domain Walls and Magnetization Curve Reviewed

    Hidsugu Sakaguchi, Yue Zhao

    Journal of the Physical Society of Japan   2019.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Mode selection on breakup of a droplet falling into a miscible solution Reviewed International journal

    Michiko Shimokawa, Hidetsugu Sakaguchi

    Physical Review Fluids   2019.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Numerical Simulation of Crystal Growth in Two Transport Fields Using a Coupled Map Lattice Reviewed

    Hidetsugu Sakaguchi, Kouki Nagata

    Journal of the Physical Society of Japan   2018.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • One-and Two-dimensional Solitary Wave States in the Nonlinear Kramers Equation with Movement Direction as a Variable Reviewed

    Hidetsugu Skaguchi, Kazuya Ishibashi

    Journal of the Physical Society of Japan   2018.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Stationary and oscillatory bound states of dissipative solitons created by third-order dispersion Reviewed International journal

    Hidetsugu Sakaguchi, Dmitry Skryabin, Boris Malomed

    Optics Letters   2018.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • TRansmission coefficient from generalized Cantor-like potentials and its multifractality Reviewed International journal

    T.Ogawana and H.Sakaguchi

    Physical Review E   97 ( 1 )   012205   2018.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • One-and two- dimensional gap solitons in spin-orbit coupled systems with Zeeman splitting Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physical Review A   97 ( 1 )   013607   2018.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Rayleigh-TAylor instability and vortex rings in coupled Gross-Pitaevskii equations Invited Reviewed International journal

    H.Sakagcuhi and H.Chono

    Physical Review E   96 ( 5 )   052222   2017.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Solitary Wave State in the Nonlinear Kramers Equation for Self-Propelled Particles Reviewed International journal

    H.Sakaguchi and K.Ishibashi

    Journal of the Physical Society of Japan   86 ( 11 )   114003   2017.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    自己駆動粒子の孤立波状態を非線形クラマース方程式を用いて解析した。

  • Flipping-shuttle oscillations of bright one- and two-dimensional solitons in spin-orbit coupled Bose-Einstein condensates with Rabi mixing Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physical Review A   96 ( 4 )   043620   2017.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Spin-orbit coupling and nonlinear modes of the Polariton condensates in a harmonic trap Reviewed International journal

    H.Sakaguchi, B.Malomed, D.Skryabin

    New Journal of Physics   19   085003   2017.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Slip-Size Distribution and Self-Organized Criticality in Block-Spring Models with Quenched Randomness Reviewed International journal

    H.Sakaguchi and S.Kadowaki

    86 ( 7 )   074001   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Mechanical Motion Induced by Spatilaly Distributed Limit-Cycle Oscillators Reviewed International journal

    H.Sakaguchi and Y.Mukae

    86 ( 3 )   034004   2017.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Scaling laws of reflection coefficients of quantum waves at a CAntor-like potentials Reviewed International journal

    H.Sakaguchi and T.Ogawana

    Physical Review E   95 ( 3 )   034004   2017.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • One- and two-dimensional soliton in PT-symmetric systems emulating spin-orbit coupling Reviewed International journal

    H.Sakaguchi and B.Malomed

    New Journal of Physics   18   105005   2016.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Aggregation Dynamics Using Phase Wave Signals and Branching Patterns Reviewed International journal

    H.Sakaguchi, T.Kusagaki

    Journal of the Physical Society of Japan   85 ( 9 )   094801   2016.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex solitons in two-dimensional spin-orbit coupled Bose-EInstein condensates: Effects of the Rashba-Dresselhaus coupling and Zeeman spliting Reviewed International journal

    H.Sakaguchi, E.Sherman, B.Malomed

    Physical Review E   94 ( 3 )   032292   2016.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Solitons and Vortex Lattices in the Gross-Pitaevskii Equation with Spin-Orbit Coupling under Rotation Reviewed International journal

    H.Sakaguchi, K.Umeda

    J. Phys. Soc. Japan   85 ( 6 )   064402   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Numerical Study of Crystal Size Distribution in Polynuclear Growth Reviewed

    Hidetsugu Sakaguchi, Takuma Ohishi

    Journal of the Physical Society of Japan   84   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Breakup and deformation of a droplet falling in a miscible solution Reviewed International journal

    M.Shimokwa, R.Mayumi, T.Nakamura, T.Takami, H.Sakaguchi

    Physical Review E   93 ( 6 )   062214   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Widening Disparity and its Suppression in a Stochastic Replicator Model Reviewed

    Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   85   2016.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Matter-wave soliton interferometer based on a nonlinear splitter Invited Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    New J. Physics   18   2016.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Cooperative dynamics in coupled systems of fast and slow phase oscillators Reviewed International journal

    Hidetsugu Sakaguchi, Takayuki Okita

    Physical Review E   84   2016.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Anomalous Fluctuations in Autoregressive Models with Long-Term Memory Reviewed

    Hidetsugu Sakaguchi, Haruo Honjo

    Journal of the Physical Society of Japan   84   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Statistical properties of approval ratings for goverments Reviewed International journal

    Hidetsugu Sakaguchi, Haruo Honjo, Masaki Sano, Hiroshi Miki

    Physica A   428   266 - 272   2015.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Discrete and contnuum composite solitons in Bose-Einstein condenstaes with the Raschba spin-orbit coupling in one and two dimensions Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    Physical Review E   90 ( 6 )   062922   2014.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Numerical Study of the Schrodinger Equation for Repulsively Interacting Particles in an Optical Lattice and Mott-like States Reviewed

    Hidetsugu Sakaguchi, Ben Li

    Journal of the Physcial Society of Japan   83 ( 11 )   114005   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Competitive aggregation dynamics using phase wave signals Reviewed International journal

    Hidetsugu Sakaguchi, Satomi Maeyama

    Journal of Theoretical Biology   359   155 - 160   2014.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Reaction-diffusion-advection equation in binary tree networks and optimal size ratio Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   90 ( 4 )   040801   2014.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Domain Wall Dynamics in Ginzburg-Landau-Type Equations with Conservation Qunatities Reviewed

    Hidetsugu Sakaguchi, Hiroshi Akamine

    Journal of the Physical Society of Japan   83 ( 6 )   064006   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Creation of two-dimensional composite solitons in spin-orbit-coupled self-attractive Bose-Einstein condensates in free space Reviewed International journal

    Hidetsugu Sakaguchi, Ben LI, Boris Malomed

    Physical Review E   89 ( 3 )   032920   2014.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Simple Model of Spritting Instability in Swollen Membarnes

    Hidetsugu Sakaguchi, Satomi Maeyama

    Physicaｌ　Ｒｅｖｉｅｗ E   ８３ ( ２ )   ０２４６０３   2014.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Modulational instability and breathing motion in the two-dimensional nonlinear Schroedinger equation with a one-dimensional harmonic potential Reviewed International journal

    Hidetsugu Sakaguchi, Yusuke Kageyama

    Physical Review E   88 ( 5 )   053202   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Intermittency and Slip-Size Distribution in the Block-Spring Model of Earthquakes Reviewed

    Hidetsugu Sakaguchi, Shingo Morita

    Journal of the Physical Society of Japan   82 ( 11 )   114006   2013.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Suppression of the quantum collapse in binary bosonic gases Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    Physical Review A   88 ( 4 )   043638   2013.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Phase Model with Feedback Control for Power Grids Reviewed

    Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   82 ( 9 )   094007   2013.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Shock Waves in Falling Coupled Harmonic Oscillators Reviewed

    Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   073401   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortical light bullets in second-harmonic-generating media supported by a trapping potential Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    Optics Express   21 ( 8 )   9813 - 9823   2013.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Dynamical quorum sensing and clustering dynamics in a population of spatially distributed active rotators Reviewed International journal

    Hidetsugu Sakaguchi, Satomi Maeyama

    Physical Review E   87 ( 2 )   024901   2013.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex lattice solutions to the Gross-Pitaevskii equation with spin-orbit coupling in optical lattices Reviewed International journal

    Hidetsugu Sakaguchi, Li Ben

    Physical Review A   87 ( 1 )   015602   2013.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Numerical Simulation of Three-Dimensional Dendrites using Coupled Map Lattices Reviewed

    Hidetsugu Sakaguchi, Mai Gondou, Haruo Honjo

    Journal of the Physical Society of Japan   81 ( 12 )   124004   2012.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Stabilizing single-and two-color vortex beams in quadratic media in a trapping potential Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    Journal of the Optical Society of America B   29 ( 10 )   2741 - 2748   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Melting Transition of Vortex Lattice in Point Vortex Systems Reviewed International journal

    Hidetsugu Sakaguchi

    Journal of the Physical Society of Japan   81 ( 10 )   104008   2012.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Cascade Failure in a Phase Model of Power Grids Reviewed

    Hidetsugu Sakaguchi, Tatsuma Matsuo

    Journal of the Physical Society of Japan   81 ( 7 )   074005   2012.7

    　More details

    Language：English  

  • Suppression of quantum collapse in a n anisotropic gas of diplolar bosons Reviewed International journal

    Hidetsugu Sakaguchi, Boris A. Malomed

    Physical Review A   84 ( 3 )   2012.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Reflection of Channel-Guided Solitons at Corners and Junctions in Two-Dimensional Nonlinear Schrodinger Equation Reviewed

    Yusuke Kageyama, Hidetsugu Sakaguchi

    Journal of Physical Society of Japan   81 ( 3 )   2012.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Spatially Periodic Domain Structure in Coupled Reaction-Diffusion Equations for Segment Formation Reviewed

    Hidetsugu Sakaguchi

    Journal of Physical Society of Japan   81 ( 2 )   2012.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Pattern Formation in a Simple Model of Photochemical Reaction Reviewed

    Hidetsugu Sakaguchi, Daishiro Kijima, Shuncuke Chatani, Toshiaki Hattori

    Journal of Physical Society of Japan   80 ( 12 )   2011.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Mechanism of Stepped Leaders in a Simple Discharge Model Reviewed

    Hidetsugu Sakaguchi, Kourkouss M. Sahim

    Journal of Physical Society of Japan   80 ( 9 )   2011.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Locomotive and reptation motin by internal force and friction Reviewed International journal

    Hidetsugu Sakaguchi, Taisuke Ishihara

    Physical Review E   83 ( 6 )   2011.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Symmetry breaking of solitons in two-component Gross-Pitaevskii equations Reviewed International journal

    Hidetsugu Sakaguchi Boris A. Malomed

    Physical Review E   83 ( 3 )   2011.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Suppression of the quantum-mechanical collapse by repulsive interactions in a quantum gas Reviewed International journal

    Hidetsugu Sakaguchi Boris A. Malomed

    Physical Review A   83 ( 1 )   2011.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Reflection and Splitting of Channel-Guided Solitons in Two-Dimensional Nonlinear Schroedinger Equation Reviewed

    Hidetsugu Sakaguchi Yusuke Kageyama

    Journal of the Physical Society of Japan   79 ( 11 )   2010.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Vortex lattices generated by the Kelvin-Helmhortz instability in the Gross-Pitaevskii equation International journal

    Akira Ohta Ryosuke Kashiwa Hidetusgu Sakaguchi

    Physical Review A   82 ( 5 )   2010.11

    　More details

    Language：English  

  • Self-ornanized criticality in an interface-growth model with quenched randomness Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   82 ( 3 )   2010.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Elimination of Breathing Spiral Waves in the Aliev-Panfilov Model Reviewed

    Hidetsugu Sakaguchi Yasuhiro Nakamura

    Journal of the Physical Society of Japan   79 ( 7 )   2010.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Branching Patterns and Stepped Leaders in an Electric-Circuit Model for Creeping Discharge Reviewed

    Hidetsugu Sakaguchi Sahim M. Kourkouss

    Journal of the Physical Society of Japan   79 ( 6 )   2010.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Coupled-map-lattice model for spontaneous pore formation in anodic oxidation Reviewed International journal

    H.Sakaguchi and J.Zhao

    Physical Review E   81   2010.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Solitons in combined linear and nonlinear lattice potentials Reviewed International journal

    H.Sakaguchi and B.A.Malomed

    Physical Review A   81   2010.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Cooperative jump motion of jammed particles in a one-dimensional periodic potential Reviewed International journal

    H.Sakaguchi

    Physical Review E   80   2009.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Kinetic Friction by a Small Number of Intervening Inelastic Particles between Rough Surfaces Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   78   2009.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Two-dimensional dissipative gap solitons Reviewed International journal

    H.Sakaguchi and B.A.Malomed

    Physical Review E   80   2009.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Splitting instability of cellular structures in the Ginzburg-Landau model under feedback control Reviewed International journal

    H.Sakaguchi

    Physical Review E   80   2009.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Ratio control in a cascade model of cell differentiation Reviewed International journal

    H.Sakaguchi

    Physical Review E   79   2009.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Solitary vortices and gap solitons in rotating optical lattices Reviewed International journal

    H.Sakaguchi and B.A.Malomed

    Physical Review A   79   2009.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Scaling Relations of Viscous Fingers in Anisotropic Hele-Shaw Cells Reviewed

    H.Sakaguchi and K.Noto

    Journal of the Physical Society of Japan   79   2009.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Delocalization transition of a small number of particles in a box with periodic boundary conditions Reviewed International journal

    H.Sakaguchi

    Physical Review E   79   2009.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Limit-cycle oscillation of an elastic filament and caterpillar motion Reviewed International journal

    H.Sakaguchi

    Physical Review E   79   2009.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Chevron patterns and defect lattices in an anisotropic model for electroconvection Reviewed International journal

    H.Sakaguchi, S.Matsuda

    Physica D   2009.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Creation and Reproduction of Model Cells with Semipermeable Membrane Reviewed

    H.Sakaguchi

    JOurnal of the Physical Society of Japan   78   2009.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Localized　matter-wave patterns with attractive intercation in rotating potentials Reviewed International journal

    H.Sakaguchi and B.A.MAlomed

    Physical Review A   78   2008.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Synchronization in coupled oscillators Invited Reviewed International journal

    H.Sakaguchi

    J. Korean Physical Society   2008.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Gap solitons in Ginzburg-Landau media Reviewed International journal

    H.Sakaguchi, B.A.Malomed

    Physical Review E   2008.11

    　More details

    Publishing type：Research paper (scientific journal)  

  • Chaotic pulse transmission and spiral formation in a calcium oscillation model Reviewed International journal

    H.Sakaguchi, P.Woafo

    Physical Review E   2008.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Elimination of pulse and spirals by external forces in Luo-Rudy model Reviewed

    H.Sakaguchi,T.Maruyama

    J. Physical Society of Japan   2008.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Symmetry breaking of vortex patterns in a rotating harmonic potential Reviewed

    H.Sakaguchi, H.Takeshita

    J. Physical Society of Japan   2008.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Scale-invariant competitive growth of side branches in a dendritic growth Reviewed International journal

    K.Kishinawa, H.Honjo, H.Sakaguchi

    Physical Review E   2008.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Global structure in spatio-temporal chaos of the Matthews-Cox equations Reviewed International journal

    Hidetsugu Sakaguchi and Dan Tanaka

    Physical Review E   2007.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Soliton turbulence in the complex Ginzburg-Landau equation Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   2007.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Charging dynamics of the electric double layer in porous media Reviewed International journal

    H.Sakaguchi and R.Baba

    Physical Review E   2007.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Channel-guided light bullets Reviewed International journal

    Hidetsugu Sakaguchi and Boris Malomed

    Physical Review A   2007.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Electric double layer on fractal electrodes Reviewed International journal

    H.Sakaguchi and R.Baba

    Physical Review E   2007.5

    　More details

    Language：Others   Publishing type：Research paper (scientific journal)  

  • Simple model for competitive dynamics among dendritic sidebranches Reviewed International journal

    H.Sakaguchi, K.Kishinawa, K.Katsuki and H.Honjo

    Phys. Rev. E   2007.2

    　More details

    Publishing type：Research paper (scientific journal)  

  • Generalized Einstein relation for Brownian motion in tiled periodic potential Reviewed International journal

    H.Sakaguchi

    Journal of the Physical Society of Japan   2006.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • A coupled map lattice model for oscillatory growth in electrodeposition Reviewed

    H.Sakaguchi, T.Yoshida, S.Nakanishi, K.Fukami,Y.Nakato

    Journal of the Physical Society of Japan   2006.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Two-dimensional dark soliton in the nonlinear Schroedinger equation Reviewed International journal

    H.Sakaguchi, T.Hiashiuchi

    Physics Letters A   2006.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Gap Soliton in quasiperiodic optical lattice Reviewed International journal

    H.Skaguchi and B.A.Malomed

    Physical Review E   2006.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Efficiency and fluctuation in a tight coupling model of molecular motor Reviewed

    Hidetsugu Sakaguchi

    Journal of Physcial Society of Japan   2006.6

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

  • Reaction-diffusion system in a vesicle with semi-permeable membrane Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   2006.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Instability of synchronized motion in nonlocal coupled neural oscillators Reviewed International journal

    Hidetsugu Sakaguchi

    Physical Review E   2006.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Higher-order vortex soliton, multipoles and supervortices in a square optical lattice Reviewed International journal

    H.Sakaguchi and B.A.Malomed

    Europhysics Letters   72 ( 5 )   698 - 704   2005.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1209/epl/i2005-10295-7

  • Elimination of spiral chaos by pulse entrainment in the Aliev-Panfilov model Reviewed International journal

    H.Sakaguchi and Y.Kido

    Physical Review E   71 ( 5 )   2005.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.71.052901

  • Scattering of Solitons and Dark Solitons by Potential Walls in the Nonlinear Schroedinger equation Reviewed International journal

    H.Sakaguchi and M.Tamura

    J.Phys.Soc.Jpn.   74 ( 1 )   292 - 298   2005.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.74.292

  • Synchronization and spindle oscillation in noisy integrate-and-fire-or-burst neurons with inhibitory coupling Reviewed

    H.Sakaguchi and S.Tobiishi

    Progress of Theoretical Physics   114 ( 3 )   539 - 554   2005.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.114.539

  • Front instability and pattern formation in the phase field model for crystal growth Invited Reviewed International journal

    H.Sakaguchi and S.Tokunaga

    Physica D   205 ( 1-4 )   222 - 232   2005.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.physd.2004.12.009

  • Renormalization group and numerical analysis of a noisy Kuramoto-Sivashinsky equation in 1+1 dimensions Reviewed International journal

    K.Ueno, H,Sakaguchi and M.Okamura

    Physical Review E   71 ( 4 )   2005.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.71.046138

  • Numerical study of the stability of double fingers with the phase field model Reviewed International journal

    S.Tokunaga and H.Sakaguchi

    Physical Review E   70 ( 1 )   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.70.011607

  • Scattering and trapping of nonlinear Schroedinger solitons in external potentials Reviewed International journal

    H.Sakaguchi and M.Tamura

    Journal of Physical Society of Japan   73 ( 3 )   503 - 506   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.73.503

  • Oscillatory phase transition and pulse propagation in noisy integrate-and-fire neurons Reviewed International journal

    H.Sakaguchi

    Physical Review E   70 ( 2 )   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.70.022901

  • Two-dimensional loosely and tightly bound solitons in optical lattices and inverted traps Reviewed International journal

    H.Sakaguchi and B.Malomed

    Journal of Physics B   37 ( 11 )   2225 - 2239   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/0953-4075/37/11/001

  • Dynamics of positive and negative-mass solitons in optical lattices and inverted traps Reviewed International journal

    H.Sakaguchi and B.Malomed

    Journal of Physics B   37 ( 7 )   1443 - 1459   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/0953-4075/37/7/006

  • Sidebranch structures of dendritic patterns in a coupled map lattice model Reviewed International journal

    H.Sakaguchi and M.Ohtaki

    J.Phys.Soc.Jpn.   73 ( 7 )   1723 - 1727   2004.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.73.1723

  • Simple dynamical models for hierarchical bunching Reviewed International journal

    H.Sakaguchi and N.Fujimoto

    Physical Review E   68 ( 5 )   2003.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.68.056103

  • Noise-induced synchronization for phase turbulence Reviewed International journal

    H.Sakaguchi

    Physics Letters   318 ( 6 )   553 - 557   2003.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.physleta.2003.09.065

  • Chaotic diffusion of particles with finite mass in oscillating and turbulent convections Reviewed International journal

    H.Sakaguchi

    International Journal of Modern Physics B   17 ( 22-24 )   4338 - 4342   2003.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1142/S0217979203022416

  • Stable solitons in coupled Ginzburg-Landau equations describing Bose-Einstein condensates and nonlinear optical waveguides and cavities International journal

    H.Sakaguchi and B.Malomed

    Physica D   183 ( 3-4 )   282 - 292   2003.9

    　More details

    Language：English  

    DOI： 10.1016/S0167-2789(03)00181-7

  • Shock structures and velocity fluctuations in the noisy Burgers and KdV-Burgers equations Reviewed

    H.Sakaguchi

    Progress of Theoretical Physics   110 ( 2 )   187 - 194   2003.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.110.187

  • Elimination of spiral chaos by periodic force for the Aliev-Panfilov model Reviewed International journal

    H.Sakaguchi and T.Fujimoto

    Physical Review E   67 ( 6 )   2003.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.67.067202

  • Solitary pulses and periodic waves in the parametrically driven complex Ginzburg-Landau equation Reviewed

    H.Sakaguchi and B.Malomed

    Journal of the Physical Scociety of Japan   72 ( 6 )   1360 - 1365   2003.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.72.1360

  • Self-organization of hierarchical structures in non-locally coupled replicator models Reviewed International journal

    H.Sakaguchi

    Physics Letters A   313 ( 3 )   188 - 191   2003.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0375-9601(03)00753-9

  • Tip oscillation of dendritic patterns in a phase field model Reviewed

    H.Sakaguchi and S.Tokunaga

    Progress of Theoretical Physics   109 ( 1 )   43 - 50   2003.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.109.43

  • Stick-slip motion and phase transition in a block-spring system Reviewed

    H.Sakaguchi

    Journal of the Phiscical Society of Japan   72 ( 1 )   69 - 73   2003.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.72.69

  • Stochastic synchronization in globally coupled phase oscillators Reviewed International journal

    H.Sakaguchi

    Physical Review E   66 ( 5 )   2002.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.66.056129

  • Forced entrainment and elimination of spiral waves for the FitzHugh-Nagumo equation Reviewed

    H.Sakaguchi and T.Fujimoto

    Progress of Theoretical Physics   108 ( 2 )   241 - 252   2002.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.108.241

  • Two-dimensional solitary pulses in driven diffractive-diffusive complex Ginzburg-Landau equations Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physica D   167 ( 3-4 )   123 - 135   2002.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0167-2789(02)00532-8

  • Chaotic diffusion of particles with finite mass in oscillating convection flows Reviewed International journal

    H.Sakaguchi

    Physical Review E   65 ( 6 )   2002.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.65.067201

  • Effective viscosity and time correlation for the Kuramoto-Sivashinsky equation Reviewed

    H.Sakaguchi

    Progress of Theoretical Physics   107 ( 5 )   879 - 887   2002.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.107.879

  • Parameter evaluation from time sequences using chaos synchronization Reviewed International journal

    H.Sakaguchi

    Physical Review E   65 ( 2 )   2002.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.65.027201

  • Stable localized pulses and zigzag stripes in a two-dimensional diffractive-diffusive Ginzburg-Landau equation Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physica D   159 ( 1-2 )   91 - 100   2001.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0167-2789(01)00334-7

  • Fluctuation dissipation relation for a Langevin model with multiplicative noise Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   70 ( 11 )   3247 - 3250   2001.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.70.3247

  • Domain-size control by global feedback in bistable systems Reviewed International journal

    H.Sakaguchi

    Physical Review E   64 ( 4 )   2001.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Instabilities and splitting of pulses in coupled Ginzburg-Landau equations Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physica D   154 ( 3-4 )   229 - 239   2001.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0167-2789(01)00243-3

  • Tip oscillation of dendritic patterns in a phase field model Reviewed

    H.Sakaguchi

    Progress of Theoretical Physics   105 ( 5 )   881 - 886   2001.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.105.881

  • Breathing and randomly walking pulses in a semilinear Ginzburg-Landau system Reviewed International journal

    H.Sakaguchi and B.Malomed

    Physica D   147 ( 3-4 )   273 - 282   2000.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0167-2789(00)00176-7

  • Shock structures in time-averaged patterns for the Kuramoto-Sivashinsky equation Reviewed International journal

    H.Sakaguchi

    Physical Review E   62 ( 6 )   8817 - 8819   2000.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.62.8817

  • Mutual entrainment and multi-stability in Josephson junction arrays Reviewed

    H.Sakaguchi and K.Watanabe

    Journal of the Physical Society of Japan   69 ( 11 )   3545 - 3551   2000.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.69.3545

  • Equilibrium and nonequilibrium states in thermostated Gledzer-Ohkitani-Yamada shell models Reviewed International journal

    H.Sakaguchi

    Physical Review E   62 ( 5 )   7520 - 7523   2000.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.62.7520

  • Localized states in a nonlinear resistor network Reviewed International journal

    H.Sakaguchi

    Progress of Theoretical Physics   2000.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

  • Phase transition in globally coupled Roessler oscillators Reviewed International journal

    H.Sakaguchi

    Physical Review E   61 ( 6 )   7212 - 7214   2000.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.61.7212

  • A simple model for spatio-temporal chaos in an unstable Burgers equation Reviewed

    H.Sakaguchi

    Progress of Theoretical Physics   103 ( 4 )   703 - 711   2000.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/PTP.103.703

  • Fluctuation theorem for a Langevin model of the Feynman ratchet Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   69 ( 1 )   104 - 108   2000.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.69.104

  • Coupled modified baker's transformations for the Ising model Reviewed International journal

    H.Sakaguchi

    Physical Review E   60 ( 6 )   7584 - 7587   1999.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.60.7584

  • A coupled map lattice model for dendritic patterns Reviewed International journal

    H.Sakaguchi and M.Ohtaki

    Physica A   272 ( 3-4 )   300 - 313   1999.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0378-4371(99)00273-3

  • A Langevin simulation for active transport Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   68 ( 5 )   1465 - 1468   1999.5

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.68.1465

  • Chaotic dynamic in an unstable Burgers equation Reviewed International journal

    H.Sakaguchi

    Physica D   129 ( 1-2 )   57 - 67   1999.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0167-2789(98)00317-0

  • A mean-field lattice model for the diffusion controled aggregation Reviewed

    H.Sakaguchi

    Journal of the Physical Society of Japan   68 ( 1 )   61 - 63   1999.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1143/JPSJ.68.61

  • Herringbone pattern for an anisotropic complex Swift-Hohenberg equation Reviewed International journal

    H.Sakaguchi

    Physical Review E   58 ( 6 )   8021 - 8023   1998.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1103/PhysRevE.58.8021

▼display all

Books

  • 現代物理入門：光学、相対論、量子論

    坂口英継（Role：Sole author）

    2023.2 

    　More details

    Language：Japanese   Book type：Scholarly book

  • 複雑系科学への招待

    坂口英継、本庄春雄（Role：Joint author）

    サイエンス社  2018.5 

    　More details

    Language：Japanese   Book type：Scholarly book

  • 基幹講座　物理学　力学

    坂口 英継, 篠本滋（Role：Joint author）

    東京図書  2013.10 

    　More details

    Language：Japanese   Book type：Scholarly book

Presentations

  • Coupled phase oscillator lattices and plastic flow Invited International conference

    Hidetsugu Sakaguchi

    25th Anniversary Symposium of German-Japanese Joint Research Project on Nonequilibrium Statistical Physics – Perspectives for Future Collaboration  2022.10 

    　More details

    Event date： 2022.10

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Kyoto   Country：Japan  

  • コロイド凝集による星形パターンの形成

    下川倫子、北畑裕之、坂口英継

    日本物理学会  2019.9 

    　More details

    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岐阜   Country：Japan  

  • Ginzburg-Landau equation for Barkhausen noises International conference

    Hidetsugu Sakaguchi

    APEF2018  2018.11 

    　More details

    Event date： 2019.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：東京大学   Country：Japan  

  • 正と負の質量をもつソリトンの運動

    坂口英継、Boris Malomed

    日本物理学会  2019.3 

    　More details

    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学   Country：Japan  

  • スピン軌道相互作用を持つボース･アインシュタイン凝縮体におけるギャップソリトン

    坂口英継、Boris Malomed

    日本物理学会  2018.9 

    　More details

    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：東京理科大学   Country：Japan  

  • Solitary wave states in the nonlinear Kramers equation for self-propelled particles International conference

    Hidetsugu Sakaguchi

    Gordon Research Conference: Oscillations and Dynamic Instabilities in Chemical Systems  2018.7 

    　More details

    Event date： 2019.6

    Language：English   Presentation type：Oral presentation (general)  

    Venue：Les Diablerets   Country：Switzerland  

  • バネブロックモデルのランダム性による自己組織化臨界現象とグーテンベルグーリヒター則

    坂口英継

    日本地球惑星科学連合2019年大会  2019.5 

    　More details

    Event date： 2019.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：幕張メッセ   Country：Japan  

  • ランダムネスをもつバネーブロックモデルにおける自己組織化臨界現象

    坂口英継、門脇駿太郎

    日本物理学会  2017.9 

    　More details

    Event date： 2018.9 - 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：岩手   Country：Japan  

  • 自己駆動粒子の集団運動と非線形Kramers方程式

    坂口英継、石橋和也

    日本物理学会  2018.3 

    　More details

    Event date： 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：野田   Country：Japan  

  • 確率的レプリケータモデルにおける格差の拡大と制御

    坂口英継

    日本物理学会  2016.9 

    　More details

    Event date： 2016.5 - 2018.5

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：金沢   Country：Japan  

  • 心臓不整脈の数理モデルにおけるスパイラルパターンとその制御 Invited

    坂口 英継

    非線形現象の数値シミュレーションと解析  2016.3 

    　More details

    Event date： 2016.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：札幌   Country：Japan  

  • 物質波の透過干渉現象の1次元シミュレーション

    坂口 英継

    非線形現象のとらえ方  2015.10 

    　More details

    Event date： 2015.10

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：湯布院   Country：Japan  

  • 非線形粘弾性項をもつCarlson-Langerモデルにおける余震の統計則

    坂口 英継, 岡村和樹

    日本物理学会  2015.9 

    　More details

    Event date： 2015.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：大阪   Country：Japan  

  • 木構造ネットワーク上の反応拡散移流方程式と肺の構造

    坂口 英継

    日本物理学会第70回年次大会  2015.3 

    　More details

    Event date： 2015.3

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：早稲田大学   Country：Japan  

  • スピン軌道相互作用項を持つGross-Pitaevskii方程式の渦ソリトン

    坂口 英継, Ben Li, Boris Malomed

    日本物理学会2014年秋季大会  2014.9 

    　More details

    Event date： 2014.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：春日井市   Country：Japan  

  • 非線形ダイナミクスの電力網モデルおよび地震モデルへの応用 Invited

    坂口 英継

    数電機シンポジウム　Mathematics in the real world 5  2013.12 

    　More details

    Event date： 2013.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：首都大学東京   Country：Japan  

  • 連成調和振動子の落下運動

    坂口 英継

    日本物理学会2013年秋季大会  2013.9 

    　More details

    Event date： 2013.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：徳島   Country：Japan  

    連成調和振動子を静かにつるした後一番上の振動子を放した後の運動を議論する。

  • Branching Pattern and Stepped Leaders in a Simple Discharge Model International conference

    Hidetsugu Sakaguchi, Kourkouss M. Sahim

    International Symposium on Complex Systems 2011  2011.12 

    　More details

    Event date： 2011.12

    Venue：東京   Country：Japan  

  • チャネル内の２次元非線形シュレディンガー方程式のソリトンの運動

    影山佑介、坂口英継

    日本物理学会  2011.9 

    　More details

    Event date： 2011.9

    Presentation type：Oral presentation (general)  

    Venue：富山   Country：Japan  

  • ボーズ・アインシュタイン凝縮体におけるケルビンヘルムホルツ不安定性による渦格子形成

    柏良輔、大田彰、坂口英継

    日本物理学会  2011.9 

    　More details

    Event date： 2011.9

    Presentation type：Oral presentation (general)  

    Country：Japan  

  • 逆２乗ポテンシャル中の粒子の中心への落下と斥力相互作用による抑制

    坂口英継、Boris Malomed

    日本物理学会  2011.9 

    　More details

    Event date： 2011.9

    Presentation type：Oral presentation (general)  

    Venue：富山   Country：Japan  

  • 移動運動の力学モデルと仕事効率

    坂口英継

    基礎物理学研究所研究会「非平衡の物理、ミクロとマクロの架け橋」  2011.8 

    　More details

    Event date： 2011.8

    Presentation type：Oral presentation (general)  

    Venue：京都   Country：Japan  

  • 自己組織化臨界現象を示す変形KPZQ方程式

    坂口英継

    基礎物理学研究所研究会「非平衡系の物理-非平衡ゆらぎと集団挙動」  2010.11 

    　More details

    Event date： 2010.11

    Presentation type：Oral presentation (general)  

    Venue：京都大学   Country：Japan  

  • 沿面放電パターンのシミュレーション

    コルコス・サヒム 坂口英継

    日本物理学会  2010.9 

    　More details

    Event date： 2010.9

    Presentation type：Oral presentation (general)  

    Venue：大阪府立大学   Country：Japan  

  • アルミニウム陽極酸化における細孔形成のCMLモデル

    坂口英継 趙潔

    日本物理学会  2010.9 

    　More details

    Event date： 2010.9

    Presentation type：Oral presentation (general)  

    Venue：大阪府立大学   Country：Japan  

  • Dynamical transitions in systems of a small number of particles International conference

    H.Sakaguchi

    Frontiers in Nonequilibrium Physics  2010.7 

    　More details

    Event date： 2010.7 - 2010.8

    Venue：京都   Country：Japan  

  • 1次元周期ポテンシャル中の協同的ジャンプ運動

    坂口英継

    日本物理学会  2010.3 

    　More details

    Event date： 2010.3

    Presentation type：Oral presentation (general)  

    Venue：岡山   Country：Japan  

  • 細胞分化のカスケードモデルと比率制御

    坂口英継

    日本物理学会  2009.9 

    　More details

    Event date： 2009.9

    Presentation type：Oral presentation (general)  

    Venue：熊本   Country：Japan  

  • 非線形シュレディンガー方程式のソリトンの外力下での運動 Invited

    坂口英継

    応用力学研究所研究集会「非線形波動の数理と物理」  2008.11 

    　More details

    Event date： 2008.11

    Presentation type：Oral presentation (invited, special)  

    Venue：春日市   Country：Japan  

  • 異方的うヴィスコスフィンガーの数値解析

    納戸一貴　坂口英継

    形の科学シンポジウム  2008.10 

    　More details

    Event date： 2008.10 - 2008.11

    Presentation type：Oral presentation (general)  

    Venue：京都   Country：Japan  

  • フィードバック制御法によるソリトン型や渦型解の数値計算

    坂口英継

    日本物理学会  2008.9 

    　More details

    Event date： 2008.9

    Presentation type：Oral presentation (general)  

    Venue：盛岡   Country：Japan  

  • Chaotic diffusion of particles in abox of periodic boundary conditions International conference

    Hidetsugu Sakaguchi

    The 5th International Conference on Nonlinear Science  2008.9 

    　More details

    Event date： 2008.9

    Presentation type：Oral presentation (general)  

    Venue：nara   Country：Japan  

  • Motion of dissipative solitons in the quintic Ginzburg-Landau equation without viscosity Invited International conference

    H.Sakaguchi

    応用数学会  2005.4 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：Athen   Country：United States  

  • Study on synchronization of coupled oscillators using the Fokker-Planck equation Invited International conference

    H.Sakaguchi

    2005.6 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：ライデン   Country：Netherlands  

  • 可逆な分子モーターモデルの効率とゆらぎ

    坂口英継

    日本物理学会  2006.9 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：千葉市  

  • Vortex interaction and two dimensional dark soliton International conference

    坂口英継

    レーザー物理学会  2006.7 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：ローザンヌ   Country：Switzerland  

  • A reaction-diffusion system in a vesicle with semi-permeable membrane International conference

    坂口英継

    9th　Tamura symposium Frontiers in Dynamics  2006.5 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：東京  

  • 樹枝状結晶の横枝競合成長の数理モデル

    坂口英継

    日本物理学会  2007.9 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：北海道大学   Country：Japan  

  • Synchronization of coupled phase oscillators Invited International conference

    H.Sakaguchi

    アジア太平洋物理会議(AAPC10)  2007.8 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：ポハン工科大学   Country：Korea, Republic of  

  • 渦点系における渦格子融解の数値シミュレーション

    坂口 英継

    日本物理学会2012年秋季大会  2012.9 

    　More details

    Language：Japanese  

    Venue：横浜   Country：Japan  

  • Motion and clustering of coupled active oscillators International conference

    坂口 英継

    Self-Organization and Emergent Dynamics in Active Soft Matter  2013.2 

    　More details

    Language：English  

    Venue：京都   Country：Japan  

  • Numerical simulation of solitons, dark solitons and vortices by the potential wall Invited International conference

    H.Sakaguchi

    レーザー物理学会  2005.7 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：京都  

  • 周期ポテンシャル中のNLSソリトンの運動

    坂口英継

    日本物理学会  2004.9 

    　More details

    Presentation type：Oral presentation (general)  

    Venue：青森大学   Country：Japan  

▼display all

MISC

  • 心筋興奮モデルにおけるスパイラルカオスとその抑制

    坂口英継

    日本物理学会誌   2005.9

    　More details

    Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Professional Memberships

  • 日本物理学会

Academic Activities

  • Screening of academic papers

    Role(s)： Peer review

    2018

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：7

  • Screening of academic papers

    Role(s)： Peer review

    2017

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：8

  • Screening of academic papers

    Role(s)： Peer review

    2016

    　More details

    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：8

  • 座長（Chairmanship）

    日本物理学会第70回年次大会  （ Japan ） 2015.3

    　More details

    Type：Competition, symposium, etc. 

  • 座長（Chairmanship）

    日本物理学会2013年秋季大会  （ Japan ） 2013.9

    　More details

    Type：Competition, symposium, etc. 

  • 座長（Chairmanship）

    日本物理学会  （ 千葉市 ） 2006.9 - Present

    　More details

    Type：Competition, symposium, etc. 

  • 座長（Chairmanship）

    日本物理学会  （ 岡山市 ） 2003.9 - Present

    　More details

    Type：Competition, symposium, etc. 

▼display all

Research Projects

  • スピン軌道相互作用を持つボース･アインシュタイン凝縮体における渦ソリトン

    Grant number：18K03462  2018 - 2020

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

  • 長距離相互作用系における運動の自己組織化

    Grant number：25400403  2013 - 2015

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

  • 分岐構造・階層構造の形成とダイナミクス

    Grant number：22540393  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

  • 反応拡散系のパターン形成と制御

    Grant number：19540407  2007 - 2009

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

  • 外部ポテンシャル中のNLSソリトンの運動

    Grant number：17540358  2005 - 2006

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

  • 時空カオスの生成モデル

    Grant number：11837014  1999 - 2000

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Authorship：Principal investigator  Grant type：Scientific research funding

▼display all

Educational Activities

  • 大学院教育
    非線形物性学（非線形現象の概論）
    量子物性学基礎（固体電子論の部分を担当）、
    応用数学（共通科目、関数解析や確率現象を担当）

    共創学部
    複雑系科学入門
    複雑系科学論

    全学共通教育
    力学同演習
    物理学基礎実験
    コア科目、物質の世界
    少人数ゼミナール

Class subject

  • 複雑系数理

    2024.6 - 2024.8   Summer quarter

  • 非線形システム基礎

    2024.6 - 2024.8   Summer quarter

  • 複雑系科学論

    2024.4 - 2024.9   First semester

  • 共創プロジェクト

    2024.4 - 2024.6   Spring quarter

  • 複雑系科学論

    2023.10 - 2024.3   Second semester

  • 現代物理学基礎

    2023.4 - 2023.9   First semester

  • 応用数学

    2023.4 - 2023.9   First semester

  • 非線形システム基礎

    2023.4 - 2023.9   First semester

  • 複雑系科学入門

    2023.4 - 2023.9   First semester

  • 複雑系科学論

    2022.10 - 2023.3   Second semester

  • 非線形システム基礎

    2022.6 - 2022.8   Summer quarter

  • 複雑系科学入門

    2022.4 - 2022.9   First semester

  • 応用数理学

    2022.4 - 2022.9   First semester

  • 現代物理学基礎

    2022.4 - 2022.9   First semester

  • 複雑系科学論

    2021.10 - 2022.3   Second semester

  • 非線形システム基礎

    2021.6 - 2021.8   Summer quarter

  • 応用数理学

    2021.4 - 2021.9   First semester

  • 複雑系科学入門

    2021.4 - 2021.9   First semester

  • 複雑系科学論

    2020.10 - 2021.3   Second semester

  • 非線形物性学特論

    2020.10 - 2021.3   Second semester

  • 非線形物性学実験

    2020.4 - 2021.3   Full year

  • 基幹物理学Ⅱ

    2020.4 - 2020.9   First semester

  • 複雑系科学入門

    2020.4 - 2020.9   First semester

  • 複雑系科学論

    2019.10 - 2020.3   Second semester

  • 非線形物性学実験

    2019.4 - 2020.3   Full year

  • 応用数学

    2019.4 - 2019.9   First semester

  • 基幹物理学Ⅱ

    2019.4 - 2019.9   First semester

  • 複雑系科学入門

    2019.4 - 2019.9   First semester

  • 非線形物性学特論

    2018.10 - 2019.3   Second semester

  • 非線形物性学実験

    2018.4 - 2019.3   Full year

  • 応用数学

    2017.10 - 2018.3   Second semester

  • 非線形物性学実験

    2017.4 - 2018.3   Full year

  • 非線形物性学特論

    2016.10 - 2017.3   Second semester

  • 非線形物性学実験

    2016.4 - 2017.3   Full year

  • 応用数学

    2015.10 - 2016.3   Second semester

  • 非線形物性学実験

    2015.4 - 2016.3   Full year

  • 基幹物理学ⅠA

    2015.4 - 2015.9   First semester

  • 基幹物理学Ⅱ

    2015.4 - 2015.9   First semester

  • 基幹物理学ⅠA

    2015.4 - 2015.9   First semester

  • 非線形物性学特論

    2014.10 - 2015.3   Second semester

  • 非線形物性学実験

    2014.4 - 2015.3   Full year

  • 基幹物理学ⅠA

    2014.4 - 2014.9   First semester

  • 基幹物理学ⅠA

    2014.4 - 2014.9   First semester

  • 非線形物性学実験

    2013.4 - 2014.3   Full year

  • 力学同演習

    2013.4 - 2013.9   First semester

  • 応用数学

    2013.4 - 2013.9   First semester

  • 非線形物性学特論

    2012.10 - 2013.3   Second semester

  • 非線形物性学実験

    2012.4 - 2013.3   Full year

  • 力学同演習

    2012.4 - 2012.9   First semester

  • 非線形物性学実験

    2011.4 - 2012.3   Full year

  • 力学同演習

    2011.4 - 2011.9   First semester

  • 応用数学

    2011.4 - 2011.9   First semester

  • 非線形物性学特論

    2010.10 - 2011.3   Second semester

  • 非線形物性学実験

    2010.4 - 2011.3   Full year

  • 力学基礎同演習

    2010.4 - 2010.9   First semester

  • 非線形物性学実験

    2009.4 - 2010.3   Full year

  • 力学基礎同演習

    2009.4 - 2009.9   First semester

  • 応用数学

    2009.4 - 2009.9   First semester

  • 非線形物性学特論

    2008.10 - 2009.3   Second semester

  • 非線形物性学実験

    2008.4 - 2009.3   Full year

  • 力学基礎同演習

    2008.4 - 2008.9   First semester

  • 非線形物性学特論

    2007.10 - 2008.3   Second semester

  • 非線形物性学実験

    2007.4 - 2008.3   Full year

  • 力学基礎同演習

    2007.4 - 2007.9   First semester

  • 応用数学

    2007.4 - 2007.9   First semester

  • 非線形物性学特論

    2006.10 - 2007.3   Second semester

  • 非線形物性学実験

    2006.4 - 2007.3   Full year

  • 力学基礎・同演習

    2006.4 - 2006.9   First semester

  • 応用数学

    2006.4 - 2006.9   First semester

  • 非線形物性学特論

    2005.10 - 2006.3   Second semester

  • 非線形物性学実験

    2005.4 - 2006.3   Full year

  • 物質の世界

    2003.10 - 2004.3   Second semester

  • 応用数学

    2003.4 - 2003.9   First semester

  • 物理学基礎実験

    2003.4 - 2003.9   First semester

  • 量子物性学基礎

    2003.4 - 2003.9   First semester

  • 物理学基礎実験

    2002.10 - 2003.3   Second semester

  • 非線形物性学

    2002.10 - 2003.3   Second semester

  • 物質の世界

    2002.4 - 2002.9   First semester

  • 量子物性学基礎

    2002.4 - 2002.9   First semester

▼display all

FD Participation

  • 2004.12   Role：Participation   Title：不明

    Organizer：University-wide

Visiting, concurrent, or part-time lecturers at other universities, institutions, etc.

  • 2021  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期

  • 2020  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2019  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2019  大阪府立大学  Classification:Intensive course 

    Semester, Day Time or Duration：後期集中

  • 2018  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2017  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2016  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2015  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜2限目

  • 2014  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜2限目

  • 2013  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期　金曜2限

  • 2012  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜、２限目

  • 2011  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜２限

  • 2010  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜2限目

  • 2009  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

  • 2008  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期金曜２限目

  • 2007  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

  • 2007  福井大学工学部  Classification:Intensive course  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、集中

  • 2006  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

  • 2005  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

  • 2004  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

  • 2003  福岡教育大学  Classification:Part-time lecturer  Domestic/International Classification:Japan 

    Semester, Day Time or Duration：後期、金曜２限

▼display all

Outline of Social Contribution and International Cooperation activities

  • 特になし

Media Coverage

  • 自己駆動粒子系の研究の紹介 Newspaper, magazine

    科学新聞  2017.11

    　More details

    自己駆動粒子系の研究の紹介

Acceptance of Foreign Researchers, etc.

  • Tel Aviv University

    Acceptance period： 2019.9  

    Nationality：Israel

  • 中国科学院

    Acceptance period： 2016.1 - 2016.2  

    Nationality：China

  • Tel Aviv University

    Acceptance period： 2015.9  

    Nationality：Israel

  • Tel Aviv University

    Acceptance period： 2014.10  

    Nationality：Israel

  • Tel Aviv University

    Acceptance period： 2013.10  

    Nationality：Israel

  • Tel Aviv University

    Acceptance period： 2010.9   （Period）：Less than 2 weeks

    Nationality：Japan

  • Tel Aviv University

    Acceptance period： 2008.12  

    Nationality：Israel

  • Bharathidasan University

    Acceptance period： 2006.8   （Period）：Less than 2 weeks

    Nationality：India

    Business entity：Japan Society for the Promotion of Science

  • Tel Aviv University

    Acceptance period： 2005.10   （Period）：Less than 2 weeks

    Nationality：Israel

▼display all

Travel Abroad

  • 2017.3 - 2017.4

    Staying countory name 1：United States   Staying institution name 1：ジョージア大学

  • 2007.8

    Staying countory name 1：Korea, Republic of   Staying institution name 1：ポハン工科大学

  • 2006.7

    Staying countory name 1：Switzerland   Staying institution name 1：ローザンヌ工科大学

  • 2005.5 - 2005.6

    Staying countory name 1：Netherlands   Staying institution name 1：ローレンツ研究所

  • 2005.4

    Staying countory name 1：United States   Staying institution name 1：ジョージア大学

  • 2002.8

    Staying countory name 1：China   Staying institution name 1：Zhejiang大学

  • 2001.10

    Staying countory name 1：Germany   Staying institution name 1：Baureuth大学

▼display all