On Obtaining Boltzmann-Distributed Configurational Ensembles from Expanded Ensemble Simulations with Fast State Mixing.

On Obtaining Boltzmann-Distributed Configurational Ensembles from Expanded Ensemble Simulations with Fast State Mixing.
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基于快速状态混合的扩展系综模拟获得玻尔兹曼分布构型系综

DOI:
10.1021/acs.jctc.9b00100
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发表时间:
2019
影响因子:
5.5
通讯作者:
L. Schäfer
L. Schäfer
中科院分区:
化学1区
文献类型:
--
作者:
S. Wingbermühle;L. Schäfer

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在扩展环境(EXE)或模拟回火模拟中,系统的(有效)温度经常更新以增强配置采样。我们研究了EXE状态更新间隔τ在过于频繁的更新妨碍玻尔兹曼采样之前可以变得多短。模拟丙氨酸二肽在明确的水,我们表明,一个混合MC/MD积分可靠地产生玻尔兹曼分布的配置,无论τ。然而,在具有短τ的MD驱动的EXE模拟中,配置集合取决于恒温器设置。
InExpanded Ensemble(EXE) orSimulated Temperingsimulations, the system’s (effective) temperature is frequently updated to enhance configurational sampling. We investigated how short the EXE state update interval τ can become before too frequent updates impede Boltzmann sampling. Simulating alanine dipeptide in explicit water, we show that a hybrid MC/MD integrator reliably yields Boltzmann-distributed configurations regardless of τ. However, in MD-driven EXE simulations with short τ, configurational ensembles depend on the thermostat settings.
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