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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >A constrained hybrid Monte-Carlo algorithm and the problem of calculating the free energy in several variables
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A constrained hybrid Monte-Carlo algorithm and the problem of calculating the free energy in several variables

机译:约束混合蒙特卡洛算法及几个变量的自由能计算问题

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We consider the problem of computing molecular free energy profiles along several orthogonal reaction coordinates by means of constrained simulations. The reaction coordinates define families of submanifolds, and the mean force along the reaction coordinates is the averaged force acting vertically to the submanifold. We give a rigorous justification for the calculation of the mean force along the constrained coordinates, and provide a concise geometrical interpretation of the different contributions to the mean force in terms of the extrinsic geometry of the submanifold. From this we are able derive a hybrid Monte-Carlo-based algorithm that can be used to compute expectation values from constrained simulations such as the mean force in the context of thermodynamic free energy statistics.
机译:我们考虑通过约束模拟沿着几个正交反应坐标计算分子自由能分布的问题。反作用力坐标定义了子流形家族,沿反作用力坐标的平均力是垂直作用于子流形的平均力。我们对沿约束坐标系的平均力的计算给出了严格的论据,并就子流形的外在几何形状提供了对平均力的不同贡献的简洁几何解释。由此,我们可以得出基于蒙特卡洛的混合算法,该算法可用于从约束模拟(例如热力学自由能统计中的平均力)计算期望值。

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