Relaxation Modes in Random Spin Systems
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概要
- 論文の詳細を見る
A method of finding slow relaxation modes in random spin systems is proposed. For stochastic dynamics, an approximate relaxation mode {f_i} and its relaxation rate λ are determined from an eigenvalue problem Σ_j C_<i, j>(t_0+t)f_j=exp (-λt) Σ_j C_<i, j>(t_0)f_j, where C_<i, j>(t)=<S_i(t)・S_j(0)> is the correlation matrix of spins. The method is applied to the two-dimensional ± J Ising spin glass below the critical temperature of the corresponding nonrandom ferromagnet. It is found through Monte Carlo simulations that the show relaxation modes obtained by the present method describe the long-time behavior of spins well. The slow relaxation modes are spatially localized and can be regarded as clusters. The distribution of the relaxation rates is consistent with the prediction of the theory which assumes independent motion of clusters.
- 社団法人日本物理学会の論文
- 1995-10-15
著者
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TAKANO Hiroshi
Department of Physics,Keio University
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Takano H
Muroran Inst. Of Technol. Hokkaido
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Miyashita Seiji
Graduate School of Human and Environmental Studies
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Takano H
Doshisha University
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Takano Hiroshi
Department Of Cardiovascular Surgery Osaka Police Hospital
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Takano Hiroshi
Department Of Applied Physics Osaka University
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TAKANO Hiroshi
Department of Physics, Osaka Unviersity
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TAKANO Hiroshi
Department of Physics, Kyusu University
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