在非平衡分子动力学中,恒温器诱导的人造车道形成
Biao Lan1,2, Yanting Wang1,2,3
1CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.
The Journal of chemical physics
|January 8, 2025
概括
在分子动力学模拟中人工车道的形成源于恒温器中的速度调整不当. 通过Langevin恒温器进行适当的调整,可以消除这种现象,在非平衡系统中保留相位空间和静止分布.
科学领域:
- 计算物理学的计算物理.
- 分子动力学模拟的模拟.
- 统计力学就是统计力学.
背景情况:
- 大多数恒温器都是为平衡系统设计的,对非平衡模拟的理论基础有限.
- 之前的研究注意到了这一点.
- 车道形成车道的形成.
- 在非平衡模拟中出现了一种工件,但其原因尚不清楚.
- 观察到全球确定性恒温器导致不间断的相空间压缩,这与理论预期相矛盾.
研究的目的:
- 在分子动力学中识别人造车道形成的动态原因.
- 为了解释阶段空间压缩在确定性恒温器的起源.
- 在非平衡模拟中展示一种消除文物和保存理论属性的方法.
主要方法:
- 使用全球确定性恒温器 (例如,诺塞-胡佛,配置恒温器) 进行分子动力学模拟的分析.
- 研究速度调整算法及其对相位空间动态的影响.
- 与使用适当的重新调度的Langevin恒温器进行比较.
主要成果:
- 人工车道的形成是由动量空间中的稳定固定点引起的,原因是速度调整不当.
- 这种工件导致物种之间的有效排斥,并耗尽动能,导致相空间压缩.
- 诺塞-胡佛和配置恒温器展示了这些文物.
结论:
- 在全球确定性恒温器中,不正确的速度调整是车道形成和相空间压缩的动态起源.
- 兰杰文恒温器,在适当的调整后,成功地消除了这些工件.
- 这项工作突出了适当的恒温器实施对于准确的非平衡模拟的重要性.
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