Kiyohide Nomura | Last modified date：2023.06.12 |

Graduate School

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Homepage

##### https://kyushu-u.pure.elsevier.com/en/persons/kiyohide-nomura

Reseacher Profiling Tool Kyushu University Pure

##### http://maya.phys.kyushu-u.ac.jp/~knomura/

Phone

092-802-4068

Fax

092-802-4107

Academic Degree

Ph. D

Country of degree conferring institution (Overseas)

No

Field of Specialization

Condensed matter physics

ORCID(Open Researcher and Contributor ID)

0000-0001-8469-078X

Total Priod of education and research career in the foreign country

00years10months

Research

**Research Interests**

- Multicritical point of the S=1 XXZ chain withe single ion anisotropy

keyword : conformal field theory, renormalization

2021.04Commensurate-incommensurate change. - Research on SU(3) quantum spin chain

keyword : SU(3), conformal field theory, renormalization

2019.04Commensurate-incommensurate change. - Anomaly of susceptibility in the quantum spin models

keyword : nonlinear susceptibility, Bethe Amsatz, conformal field theory, renormalization

2017.04Commensurate-incommensurate change. - Study of the Ashkin-Teller multicritical point

keyword : Ashkin-Teller model, antiperiodic boundary condition, conformal field theory, duality

2016.01Commensurate-incommensurate change. - Extension of Lieb-Schultz-Mattis Theorem

keyword : Lieb-Schultz-Mattis Theorem， U(1) symmetry translational symmetry， frustration, topological aspect

2014.01Commensurate-incommensurate change. - commensurate-incommensurate change

keyword : AKLT, BLBQ, ANNNI,

2003.01Commensurate-incommensurate change. - Application of the level-spectroscopy method to low dimensional systems

keyword : conformal field theory, Berezinskii-Kosterlitz-Thouless(BKT) transition renormalization group one-dimensinal quantum system two-dimensinal classical system

1995.04Low dimensional quantum system.

**Academic Activities**

**Papers**

**Presentations**

1. | 野村 清英, Multicritical point, conformal field theory and duality, 統計力学セミナー StatPhys Seminar @ UTokyo Hongo, 2020.09, Critical phenomena are one of the important subjects in condensed matter physics. Many developments about critical phenomena, such as renormalization group, numerical methods etc. have been done. But, when the model has a multicritical point, the scaling behaviors become difficult due to the interference of multiple critical lines. So, conventional numerical methods are not useful near a multicritical point. We have studied several multicritical phenomena combining with the conformal field theory and numerical methods (level spectroscopy etc) [1,2]. And we discuss the relation with the duality, such as the Kramers-Wannier duality and the Ashkin-Teller self-duality [2]. [1] A.Kitazawa and K.N.: Phys. Rev. B 59, 11358 [2] S. Moriya and K. N: J. Phys. Soc. Jpn. 89, 093001 (2020). |

2. | Ashkin-Teller multicritical point and twisted boundary conditions. |

3. | Anomaly of a magnetic susceptibility in XXZ model for S=1/2 and comparison with an exact solution. |

4. | 野村 清英, Extension of the Lieb-‐Schultz-‐Mattis and Kolb theorem, STATPHYS26, 2016.07, [URL]. |

5. | Appllication of the LSM theorem to the quantum spin ladder with frustration. |

6. | 野村 清英, Extension of Lieb-Schultz-Mattis Theorem , ICNS 2015 (Changhua) , 2015.09, [URL]. |

7. | Extension of Lieb-Schultz-Mattis Theorem III. |

8. | Extension of Lieb-Schultz-Mattis Theorem II. |

9. | Commensurate-Incommensurate Transition using Complex Analysis. |

10. | Extension of the Lieb-Schultz-Mattis Theorem. |

11. | Extension of the Lieb-Schultz-Mattis Theorem. |

12. | Level Spectroscopy without the Bond-Inversion Symmetry --- In case of an Anisotropic S=1/2 Ladder with Alternating Rung Interactions. |

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