arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.2817cond-mat.stat-mech
收藏

非平衡动态相关长度标度法

Nonequilibrium dynamic-correlation-length scaling method

Tota Nakamura

摘要:

平衡态蒙特卡罗模拟中的有限尺寸标度方法和非平衡态弛豫模拟中的有限时间标度方法得到了折衷。通过动态相关长度的MC时间数据来缩放各种物理量的MC时间数据,这对应于在有限尺寸标度方法中改变系统尺寸。在三维铁磁Ising自旋模型和三维$\pm J$ Ising自旋玻璃模型中对这种标度方法进行了测试。由磁化率的非平衡弛豫数据和动力学关联长度以及动力学指数得到了相变温度和临界指数$η$和$ν$。本文还对非平衡弛豫过程中动态关联长度的定义作了评述。Ornstein-Zernike公式并不总是合适的。

英文摘要:

The finite-size scaling method in the equilibrium Monte Carlo(MC) simulations and the finite-time scaling method in the nonequilibrium-relaxation simulations are compromised. MC time data of various physical quantities are scaled by the MC time data of the dynamic correlation length, which corresponds to changing the system size in the finite-size scaling method. This scaling method is tested in the three-dimensional ferromagnetic Ising spin model and in the three dimensional $\pm J$ Ising spin-glass model. The transition temperature and the critical exponents, $η$ and $ν$, are obtained by the nonequilibrium relaxation data of the susceptibility and the dynamic correlation length apart from the dynamic exponent. We also comment on the definition of the dynamic correlation length in the nonequilibrium relaxation process. The Ornstein-Zernike formula is not always appropriate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑