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Monte Carlo Studies on Classical and Quantum Random Spin Systems

Monte Carlo Studies on Classical and Quantum Random Spin Systems
经典和量子随机自旋系统的蒙特卡罗研究
批准号:
05804017
负责人:
OKABE Yutaka
金额:
$1.02万
依托单位国家:
日本
项目类别:
Grant-in-Aid for General Scientific Research (C)
财政年份:
1993
资助国家:
日本
项目状态:
已结题
起止时间:
1993 至 1994

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英文摘要
It is interesting to study the effect of randomness on the phase transions and critical phenomena. We nsed massive Monte Carlo simulations to get accurate numerical information on the random spin systems.We proposed to use the histogram method for the study of spin-glass problems. Calculating the replica-ovelap parameter for various temperatures and for various magnetic fields by a simulation for a single parameter, we investigated the spin-glass transition under magnetic field for the three-and four-dimensional short-ranged spin-glass models.We also investigated the thermodynamic properties of alternating-bond quantum spin systems by using the quantum Monte Carlo method. The magnetization process, the spin-spin correlation functions, and the energy dispersion curves were calcuated.
期刊论文(28)
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会议论文
Y.Okabe.M.Kikuchi and K.Niizeki: "Application of Finite-Size Scaling to Phase Transitions and Localization-Delocalization Transitions" Computer Simulation Studies in Condensed Matter Physics V,edited by D.P.Landau, K.K.Mon and H.-B.Schuttler. (Springer, B
Y.Okabe.M.Kikuchi 和 K.Niizeki:“有限尺寸缩放在相变和定域-离域转变中的应用”凝聚态物理中的计算机模拟研究 V,由 D.P.Landau、K.K.Mon 和 H.-B 编辑。
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K.Satoh and Y.Okabe: "Critical Phenomenon in a Neural Network Model:A Localization-Delocalization Transition of Excited Clusters" J.Phys.Soc.Jpn.62. 64-71 (1993)
K.Satoh 和 Y.Okabe:“神经网络模型中的关键现象:激发簇的定位-离域转变”J.Phys.Soc.Jpn.62。
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Y.Okabe and N.Kai: "Alternating Quantum Antiferro magnetic Chains with Discommensurations:A Quantum Morte Corlo Study" Proceedings of the 6th Joint EPS-APS International Conference on Physics Computing. 715-718 (1994)
Y.Okabe 和 N.Kai:“Alternating Quantum Antiferro Magnetic Chains with Discommensurations:A Quantum Morte Corlo Study”第六届 EPS-APS 国际物理计算联合会议论文集。
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19
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