Yoshihiro Nishiyama - My portal

Profile Information

Affiliation: Assistant Professor, Graduate School of Natural Science and Technology, Okayama University

Degree: 博士(理学)(東京大学)

J-GLOBAL ID: 200901071507527445
researchmap Member ID: 5000011548

Research Interests

Research Areas

Natural sciences / Mathematical physics and basic theory /

Papers

Transverse-field XY spin chain with the competing long-range interactions: multi-criticality around the XX-symmetric point

Yoshihiro Nishiyama

Journal of Statistical Mechanics: Theory and Experiment, 2023(8) 083102-083102, Aug 1, 2023
End-point singularity of the XY-paramagnetic phase boundary for the $$(2+1)$$D $$S=1$$ square-lattice $$J_1$$–$$J_2$$ XY model with the single-ion anisotropy

Yoshihiro Nishiyama

The European Physical Journal B, 96(7), Jul 12, 2023
Criticality of the excess energy cost due to the unit-flux-quantum external field for the (2 + 1)D superfluid–insulator transition

Yoshihiro Nishiyama

Journal of Statistical Mechanics: Theory and Experiment, 2022(3) 033102-033102, Mar 1, 2022
Fidelity-mediated analysis of the transverse-field XY chain with the long-range interactions: anisotropy-driven multi-criticality

Yoshihiro Nishiyama

The European Physical Journal B, 94(11), Nov, 2021
Two-dimensional easy-plane SU(3) magnet with the transverse field: anisotropy-driven multicriticality

Yoshihiro Nishiyama

Journal of Statistical Mechanics: Theory and Experiment, 2021(3) 033103-033103, Mar 1, 2021
Imaginary-field-driven phase transition for the 2D Ising antiferromagnet: A fidelity-susceptibility approach

Yoshihiro Nishiyama

Physica A: Statistical Mechanics and its Applications, 555 124731-124731, Oct, 2020
Fidelity-susceptibility analysis of the honeycomb-lattice Ising antiferromagnet under the imaginary magnetic field

Yoshihiro Nishiyama

The European Physical Journal B, 93(9), Sep, 2020
Multicritical behavior of the fidelity susceptibility for the 2D quantum transverse-field XY model

Yoshihiro Nishiyama

The European Physical Journal B, 92(8), Aug, 2019
Criticality of the Higgs mass for the long-range quantum XY chain: Amplitude ratio between the Higgs and paramagnetic gaps

Yoshihiro Nishiyama

Physica A: Statistical Mechanics and its Applications, 527 121395-121395, Aug, 2019
Criticality of the magnon-bound-state hierarchy for the quantum Ising chain with the long-range interactions

Yoshihiro Nishiyama

The European Physical Journal B, 91(11), Nov, 2018
Criticality of the low-frequency conductivity for the bilayer quantum Heisenberg model

Yoshihiro Nishiyama

The European Physical Journal B, 91(4), Apr, 2018
Duality-mediated critical amplitude ratios for the (2 + 1)-dimensional S = 1XY model

Yoshihiro Nishiyama

The European Physical Journal B, 90(9), Sep, 2017
Hierarchy of the low-lying excitations for the (2+1)-dimensional q=3 Potts model in the ordered phase

Yoshihiro Nishiyama

Nuclear Physics B, 916 28-36, Mar, 2017
Magnon hierarchy for the (2+1)-dimensional Ising model

Nishiyama Yoshihiro

Meeting Abstracts of the Physical Society of Japan, 71 2641-2641, 2016

Misc.

Magnon-bound-state hierarchy for the two-dimensional transverse-field Ising model in the ordered phase

Yoshihiro Nishiyama

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 463 303-309, Dec, 2016
Universal scaled Higgs-mass gap for the bilayer Heisenberg model in the ordered phase

Yoshihiro Nishiyama

EUROPEAN PHYSICAL JOURNAL B, 89(2) 1-5, Feb, 2016
Universal critical behavior of the two-magnon-bound-state mass gap for the (2+1)-dimensional Ising model

Yoshihiro Nishiyama

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 413 577-582, Nov, 2014
10aAY-13 Universal bound-state energy of the (2+1)D Ising model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 69(2) 183-183, Aug 22, 2014
28pAK-13 Deconfined criticality for the spatially anisotropic quantum spin model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 69(1) 333-333, Mar 5, 2014
Critical behavior of the fidelity susceptibility for the d=2 transverse-field Ising model

Yoshihiro Nishiyama

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 392(19) 4345-4350, Oct, 2013
Criticality of the fidelity susceptibility for the d=2 TFI model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 68(2) 260-260, Aug 26, 2013
29pXZC-9 Criticality of the fidelity susceptibility for the d=2 TFI model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 68(1) 414-414, Mar 26, 2013
Criticalities of the transverse- and longitudinal-field fidelity susceptibilities for the d=2 quantum Ising model

Physical Review E, 88 012129-5, 2013
20pAC-12 Deconfined criticality for the S=1 spatially-anisotropic-triangular-lattice model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 67(2) 292-292, Aug 24, 2012
26pAG-5 Phase diagram of the extended J_1-J_2 model with biquadratic interaction

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 67(1) 350-350, Mar 5, 2012
22aEC-6 Suppression of the finite-size corrections due to the screw-boundary condition

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 66(2) 215-215, Aug 24, 2011
26aTE-9 Deconfined criticality for the S=1 spatially-anisotropic-triangular-lattice model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 66(1) 306-306, Mar 3, 2011
23aTE-10 Crumpling transition of the discrete planar folding

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 65(2) 212-212, Aug 18, 2010
23pEH-3 Discrete folding without the open edges

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 65(1) 354-354, Mar 1, 2010
26aQK-1 Elimination of corrections to scaling for the S=1 TF Ising model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 64(2) 181-181, Aug 18, 2009
27pTJ-10 Deconfinement criticality for the spatially anisotropic triangular antiferromagnet

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 64(1) 272-272, Mar 3, 2009
Numerical diagonalization analysis of the criticality of the (2+1) -dimensional XY model: Off-diagonal Novotny's method

Yoshihiro Nishiyama

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 78(2) 021135-1-021135-7, Aug 27, 2008
22aVA-3 Numerical diagonalization analysis of the (2+1)-dimensional XY model

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 63(2) 229-229, Aug 25, 2008
23aWD-7 Bound-state energy of the 3D Ising model in the broken-symmetry phase

Nishiyama Yoshihiro

Meeting abstracts of the Physical Society of Japan, 63(1) 264-264, Feb 29, 2008

Presentations

二次元反強磁性イジング模型における虚数磁場フィデリティ感受率の計算

西山由弘

日本物理学会第74回年次大会, Mar 18, 2020
長距離相互作用量子イジング鎖におけるマグノン束縛状態の臨界現象

西山由弘

日本物理学会2018年秋季大会, Sep 12, 2018
二次元量子ポッツ模型の秩序相の素励起ヒエラルキー

西山由弘

日本物理学会第72回年次大会, Mar 20, 2017
(d,m)=(3,2)型リフシッツ点の臨界性:2+1次元gonihedric模型

日本物理学会第62回年次大会, 2007
d=5イジング模型の有限サイズスケーリング:ハイパースケーリングの破れの影響

日本物理学会2007年春季大会, 2007
繰り込み固定点付近での有限サイズスケーリング補正の軽減

日本ん物理学会２００６年秋季大会, 2006
三次元ボンドパーコレーションの転送行列の構成と応用

日本物理学会第61回年次大会, 2006
DMRGの三角格子の折りたたみ問題への応用としわくちゃ転移の解析II

日本物理学会2005年秋季大会, 2005
2と3次元の間のXY型臨界現象の解析: Novotny法の応用

日本物理学会台60回年次大会, 2005
相互作用する曲面のガス(ゴニヘドリック)模型の多重臨界性

日本物理学会2004年秋季大会、, 2004
Discrete Folding in three dimensions: Density-Matrix-Renormalization-Group Study

STATPHYS 22, 2004
4量体化されたS=1/2梯子の磁化過程

日本物理学会、第59回年次大会, 2004
DMRGの三角格子の折りたたみ問題への応用とcrumpling転移の解析

日本物理学会、第59回年次大会, 2004
DMRGの膜の熱力学への応用と実効曲げ弾性係数の解析II

日本物理学会2003年秋季大会, 2003
スピン1/2-XXZ 鎖の Emptiness Formation Probability の漸近的ふるまい

日本物理学会、第58回年次大会, 2003
DMRGの膜の熱力学への応用と実効曲げ弾性係数の解析

日本物理学会、第58回年次大会, 2003
1次元ハイゼンベルグ XXX 模型の Emptiness Formation Probability

日本物理学会2002年秋季大会, 2002
剛体壁間の紐の量子揺らぎによる衝突エントロピーII

日本物理学会2002年秋季大会, 2002
DMRGと強結合展開による$1+1$D$\phi^4$格子模型の(偽)真空の研究

日本物理学会第57回年次大会, 2002
1次元等方的 XY 模型の Emptiness Formation Probability

日本物理学会2001年秋季大会, 2001

Professional Memberships

日本物理学会

Research Projects

（２＋１）Ｄの交流伝導率やスペクトル関数の臨界性ーＣＰ，Ｏ（Ｎ）系へのプローブー

科学研究費助成事業, 基盤研究(C), 日本学術振興会, Apr, 2020 - Mar, 2025

西山由弘
Quantum Novotny method as an alternative DMRG and deconfined criticality

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2013 - Mar, 2018

Yoshihiro Nishiyama
Novotny's transfer matrix method for the high dimensional systems : An extension of DMRG

Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, 2006 - 2008

NISHIYAMA Yoshihiro
ノボトニー法による高次元系の転送行列の構成と応用-DMRG的な利点を高次元系へ-

科学研究費助成事業, 日本学術振興会, 2006 - 2008

西山由弘
密度行列繰り込み群のソフトマターへの応用-脂質膜の実効曲げ弾性係数の解析-

科学研究費助成事業, 若手研究(B), 日本学術振興会, 2003 - 2005

西山由弘
密度行列繰り込み群によるボソニックな自由度の解析

科学研究費助成事業, 若手研究(B), 日本学術振興会, 2001 - 2002

西山由弘