Thermally activated escape with potential fluctuations driven by an Ornstein-Uhlenbeck process
Physical Review E, ISSN: 1063-651X, Vol: 52, Issue: 2, Page: 1579-1600
1995
- 61Citations
- 12Captures
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Article Description
We study the mean escape time T̄ of an overdamped Brownian particle in a metastable potential that is subject to additive Gaussian white noise (thermal noise) and multiplicative Ornstein-Uhlenbeck noise (potential fluctuations). We derive two very general simple conditions for the existence of ''resonant activation,'' i.e., a minimum of T̄ as a function of the correlation time τ of the potential fluctuations. In the case of small thermal and potential fluctuations, we investigate T̄(τ) for large τ by means of a kinetic model and the remaining τ regime by means of quasipotential theory. We find three different types of ''resonant activation'': a standard type, a type that typically occurs for potentials without fluctuations near the barrier and the well, and a mixed type. © 1995 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=18344374803&origin=inward; http://dx.doi.org/10.1103/physreve.52.1579; http://www.ncbi.nlm.nih.gov/pubmed/9963579; https://link.aps.org/doi/10.1103/PhysRevE.52.1579; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevE.52.1579/fulltext; http://link.aps.org/article/10.1103/PhysRevE.52.1579
American Physical Society (APS)
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