Reweighted ensemble dynamics simulations: theory, improvement, and application

Linchen Gong; Xin Zhou; Zhong-Can Ou-Yang

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arXiv · 0911.3527

Reweighted ensemble dynamics simulations: theory, improvement, and application

Linchen Gong·Xin Zhou·Zhong-Can Ou-Yang

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Abstract

Based on multiple parallel short molecular dynamics simulation trajectories, we designed the reweighted ensemble dynamics (RED) method to more efficiently sample complex (biopolymer) systems, and to explore their hierarchical metastable states. Here we further present an improvement to depress statistical errors of the RED and we discuss a few keys in practical application of the RED, provides schemes on selection of basis functions, determination of free parameter in the RED. We illustrate the application of the improvements in two toy models and in the solvated alanine dipeptide. The results show the RED enable to capture the topology of multiple-state transition networks, to detect the diffusion-like dynamical behavior in entropy-dominated system, and to identify solvent effects in the solvated peptides. The illustrations serve as general applications of the RED in more complex biopolymer systems.

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Linchen Gong, Xin Zhou, Zhong-Can Ou-Yang. 2009-11-18. Reweighted ensemble dynamics simulations: theory, improvement, and application. https://arxiv.org/abs/0911.3527

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