Multilevel coarse graining and nano--pattern discovery in many particle stochastic systems

Details Multilevel coarse graining and nano--pattern discovery in many particle stochastic systems Multilevel coarse graining and nano--pattern discovery in many particle stochastic systems

2011-09-02

arxiv.org/abs/1109.0459v1

Mathematics

Numerical Analysis

37 pages

Scientific paper

In this work we propose a hierarchy of Monte Carlo methods for sampling equilibrium properties of stochastic lattice systems with competing short and long range interactions. Each Monte Carlo step is composed by two or more sub - steps efficiently coupling coarse and microscopic state spaces. The method can be designed to sample the exact or controlled-error approximations of the target distribution, providing information on levels of different resolutions, as well as at the microscopic level. In both strategies the method achieves significant reduction of the computational cost compared to conventional Markov Chain Monte Carlo methods. Applications in phase transition and pattern formation problems confirm the efficiency of the proposed methods.

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