Umbrella integration with higher-order correction terms.
Umbrella integration with higher-order correction terms.
复制标题
与高阶校正项的伞式集成。
DOI:
10.1063/1.4729373
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
J. Kästner
中科院分区:
文献类型:
--
作者:
J. Kästner
Umbrella integration is a method to analyze umbrella sampling simulations. It calculates free-energy changes from distributions obtained from molecular dynamics. While it can be formulated on the full sampled distributions, they are generally approximated by normal distributions. This is equivalent to the truncation of a power series of the free energy with respect to the reaction coordinate after the quadratic term or by a truncation of a cumulant expansion. Here, expressions for additional terms in the power series are derived. They can be calculated from the central moments of the distributions. This extension allows to test the approximations in applications.
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