Studies on Relaxation Mechanism of Sptems with Multiple Metastable States

多亚稳态细胞弛豫机制的研究

• 批准号: 03640333
• 负责人: KAWASAKI Tatsuo
• 金额: $ 1.09万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640333/
• 关键词: metastable states; Dynamical behavior; Relaxation mechanism; Fuzzy Spin Model; clustering; random system; space patterns; Ising model; ファジ-スピン; シミュレイション; スピノ-ダル分解; 不純物効果; 緩和時間; 6ークロック模型; 量子ゆらぎ

Dynamical behavior of a system depends strongly on the existence of metastable states: Relaxation mechanism, dynamical scaling etc are essentially different from a simple system without metastable states.T. Kawasaki and S. Miyashita studied size dependence of relaxation time in the Fuzzy Spin Model. It is found that clustering picture is important when the relaxation mechanism is studied in the random system.H. Tomita studied developing process of space patterns in the conserved system. He succeeds in making visualization of the processes.H. Tomita ans S. Miyashita carried intensive simulation on the dynamic Ising model, finding size effects in the relaxation process of metastab states.S. Miyashita made simulation in quantum systems as well as in classical systems: Ordering processes of ferromagnets on the honneycomb lattice, effects of degeneracy of the states due to frustrations on phase transtion and impurity effects in the 2d Heisenberg antifferomagnet.

系统的动力学行为强烈地依赖于亚稳态的存在：弛豫机制、动力学标度等与没有亚稳态的简单系统有本质的不同。T.川崎和S.宫下在模糊自旋模型中研究了弛豫时间的尺寸依赖关系。研究发现，在研究随机系统中的松弛机制时，聚集图是重要的。H.Tomita Ans S.Miyashita对动态Ising模型进行了密集的模拟，发现亚电子态的驰豫过程中存在尺寸效应。S.Miyashita在量子系统和经典系统中都进行了模拟：铁磁体在honnecomb晶格上的有序化过程，由于受挫导致的态简并对相变的影响以及二维Heisenberg反差磁体中的杂质效应。

项目成果

J.Behre and S.MIYASITA: "Quevtum Monte Carle Simulation of Rlutad Heuevleerg Antfersomagnits(S=1/2)on the Sguere Lattice" J.Php.A. 25. 4745-4755 (1992)

J.Behre 和 S.MIYASITA：“Sguere 晶格上 Rlutad Heuevleerg Antfersomagnits(S=1/2) 的 Quevtum Monte Carle 模拟”J.Php.A。

O. Nagai, S. Miyashita & T. Horiguchi J. Bhere and S. Miyashita: "Thermodynamic Prop@erties of the Ising like Heisenberg Antiferromagnet (A-type) on the Hexagonal Lattice Effects of Edges in S=1 Heisenberg Antiferromagnetic Chain" J.Phys.A. 25. 4745-4755

O.永井、S.宫下

S.Miyashita and J.Behre: "Quantum Effects in Random Spin Systems" Computational Approaches in Condensed Matter Physics SpringerーVerlag. (1992)

S. Miyashita 和 J. Behre：“随机自旋系统中的量子效应”凝聚态物理计算方法 Springer-Verlag (1992)。

H.TOMITA and S.MIYASHITA: "Stafistrcal Proportres of the relaxayran Processes of metastable states in the hinatic Isint model" Phys,Rev.B46. 8886-8893 (1992)

H.TOMITA 和 S.MIYASHITA：“hinatic Isint 模型中亚稳态的relaxayran 过程的 Stafistrcal Proportres”Phys，Rev.B46。

T.HORIGUCHI,O.NAGAI and S.MIYASHITA: "Low Tempretus Oehavers of artfersonognetic Ising Model of Ivfirte Spin on Tvayler Lattice" J.Pkpsce JPN. 61. 3114-3124 (1992)

T.HORIGUCHI、O.NAGAI 和 S.MIYASHITA：“Tvayler 晶格上 Ivfirte 自旋的人工声学 Ising 模型的低温度 Oehavers”J.Pkpsce JPN。