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arXiv physics/0403093physics.comp-ph
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自由能差的单系综非平衡路径抽样估计

Single-ensemble nonequilibrium path-sampling estimates of free energy differences

F. Marty Ytreberg, Daniel M. Zuckerman

摘要:

我们介绍了一个简单的,单一的合奏,路径采样方法来计算自由能差的基础上Jarzynski的关系。对于一个二维的“玩具”测试系统,新的(最小优化)方法执行大约一百倍的速度比优化的“传统”的Jarzynski计算或传统的热力学积分。基本形式主义的简单性表明,该方法将在分子系统中找到广泛的适用性。

英文摘要:

We introduce a straightforward, single-ensemble, path sampling approach to calculate free energy differences based on Jarzynski's relation. For a two-dimensional ``toy'' test system, the new (minimally optimized) method performs roughly one hundred times faster than either optimized ``traditional'' Jarzynski calculations or conventional thermodynamic integration. The simplicity of the underlying formalism suggests the approach will find broad applicability in molecular systems.

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