对于动力Ising模型的蒙特卡洛模拟的稀释算法
1G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine, 36 Akademika Vernadsky Boulevard, 03142 Kyiv, Ukraine.
Physical review. E
|December 23, 2025
概括
使用非均波桑过程 (NHPPs) 的新稀释方法,对动态Ising模型 (KIMs) 的加速蒙特卡洛模拟使得研究元稳态衰变和歇斯底里动力学成为可能. 这种进步使得比以前更长的时间尺度和更高的频率的现象模拟成为可能.
科学领域:
- 计算物理 计算物理
- 统计力学 统计力学
- 材料科学 材料科学 材料科学
背景情况:
- 动力异位模型 (KIMs) 对于理解相位过渡和元稳定性至关重要.
- 在KIM中模拟长时间范围的动态,特别是Glauber旋转转动态,带来了重大的计算挑战.
- 非均的波桑过程 (NHPP) 经常用于模拟时间依赖系统中的事件发生.
研究的目的:
- 调整稀释方法以数值生成NHPP到达时间.
- 为了加快KIM的蒙特卡罗模拟,特别是转稳态衰变和歇斯底里.
- 以以前无法获得的时间尺度和频率对现象进行模拟.
主要方法:
- 适应NHPP的稀释方法,以加快KIM模拟.
- 使用零件式恒定大化函数实现稀释.
- 在静止的KIM中模拟元稳态衰变.
- 在周期性外部场中模拟KIM歇斯底里.
主要成果:
- 适应的稀释方法显著加快了KIM的蒙特卡洛模拟.
- 模拟实现了前所未有的时间尺度,用于转稳态衰变 (寿命数量级更长).
- 歇斯底里斯在几十纳米赫兹的频率上被模拟,延伸到实际的低温.
结论:
- 开发的算法为模拟KIM中的复杂动态提供了强大的工具.
- 这种加速在材料科学中为研究元稳定性和歇斯底里斯开辟了新的途径.
- 该方法在实际温度下适用性使其适用于各种应用,包括超热研究.
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