Kramers' law for a bistable system with time-delayed noise
We demonstrate that the classical Kramers' escape problem can be extended to describe a bistable system under the influence of noise consisting of the superposition of a white Gaussian noise with the same noise delayed by time tau . The distribution of times between two consecutive switches dec...
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Published in | Physical review. E, Statistical, nonlinear, and soft matter physics Vol. 76; no. 3 Pt 1; p. 031128 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.09.2007
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Abstract | We demonstrate that the classical Kramers' escape problem can be extended to describe a bistable system under the influence of noise consisting of the superposition of a white Gaussian noise with the same noise delayed by time tau . The distribution of times between two consecutive switches decays piecewise exponentially, and the switching rates for 0<t<tau and tau<t<2tau are calculated analytically using the Langevin equation. These rates are different since, for the particles remaining in one well for longer than tau, the delayed noise acquires a nonzero mean value and becomes negatively autocorrelated. To account for these effects we define an effective potential and an effective diffusion coefficient of the delayed noise. |
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AbstractList | We demonstrate that the classical Kramers' escape problem can be extended to describe a bistable system under the influence of noise consisting of the superposition of a white Gaussian noise with the same noise delayed by time tau . The distribution of times between two consecutive switches decays piecewise exponentially, and the switching rates for 0<t<tau and tau<t<2tau are calculated analytically using the Langevin equation. These rates are different since, for the particles remaining in one well for longer than tau, the delayed noise acquires a nonzero mean value and becomes negatively autocorrelated. To account for these effects we define an effective potential and an effective diffusion coefficient of the delayed noise. |
Author | Curtin, D Houlihan, J Piwonski, T Huyet, G Goulding, D Melnik, S Gleeson, J P |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/17930220$$D View this record in MEDLINE/PubMed |
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