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arXiv 1405.4497cond-mat.stat-mech
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单自旋翻转动力学中的有效遍历性

Effective ergodicity in single-spin-flip dynamics

Mehmet Süzen

摘要:

收敛到有效遍历性的一个定量度量,Thirumalai山(TM)度量,适用于大都市和Glauber单自旋翻转动力学。在计算这一措施,有限的晶格系综平均使用一维伊辛模型的精确解,而时间平均计算与蒙特卡罗模拟。监测伊辛磁化的有效遍历收敛的时间演化。通过这种方法,扩散制度的有效遍历收敛的磁化被确定为不同的晶格尺寸,非零温度,和非零的外部磁场值。结果表明,应谨慎使用时,TM度量系统参数,引起强相关性。

英文摘要:

A quantitative measure of convergence to effective ergodicity, the Thirumalai-Mountain (TM) metric, is applied to Metropolis and Glauber single-spin-flip dynamics. In computing this measure, finite lattice ensemble averages are obtained using the exact solution for a one dimensional Ising model, whereas the time averages are computed with Monte Carlo simulations. The time evolution of the effective ergodic convergence of Ising magnetization is monitored. By this approach, diffusion regimes of the effective ergodic convergence of magnetization are identified for different lattice sizes, nonzero temperature, and nonzero external field values. Results show that caution should be taken when using the TM metric at system parameters that give rise to strong correlations.

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