Weighted-ensemble Brownian dynamics simulation: Sampling of rare events in nonequilibrium systems

Autor(es)

Kromer, Justus A. ^[1] ; Schimansky-Geier, Lutz ^[1] ; Toral, Raul ^[2]

Afiliação do(s) autor(es)

^[1] Humboldt Univ, Dept Phys, D-12489 Berlin - Germany

^[2] CSIC UIB, IFISC, E-07122 Palma De Mallorca - Spain

• Tipo de documento: Artigo Científico
• Fonte: Physical Review E; v. 87, n. 6 JUN 28 2013.
• Citações Web of Science: 7

Resumo

We provide an algorithm based on weighted-ensemble (WE) methods, to accurately sample systems at steady state. Applying our method to different one- and two-dimensional models, we succeed in calculating steady-state probabilities of order 10(-300) and reproduce the Arrhenius law for rates of order 10(-280). Special attention is payed to the simulation of nonpotential systems where no detailed balance assumption exists. For this large class of stochastic systems, the stationary probability distribution density is often unknown and cannot be used as preknowledge during the simulation. We compare the algorithm's efficiency with standard Brownian dynamics simulations and the original WE method. (AU)

• Processo FAPESP: 11/50151-0 - Fenômenos dinâmicos em redes complexas: fundamentos e aplicações
• Beneficiário: Elbert Einstein Nehrer Macau
• Modalidade de apoio: Auxílio à Pesquisa - Temático