Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-07-17
Phys. Rev. E 76, 021125 (2007)
Physics
Condensed Matter
Statistical Mechanics
9 pages, 1 figure
Scientific paper
10.1103/PhysRevE.76.021125
We propose generalization of escape rate from a metastable state for externally driven correlated noise processes in one dimension. In addition to the internal non-Markovian thermal fluctuations, the external correlated noise processes we consider are Gaussian, stationary in nature and are of Ornstein-Uhlenbeck type. Based on a Fokker-Planck description of the effective noise processes with finite memory we derive the generalized escape rate from a metastable state in the moderate to large damping limit and investigate the effect of degree of correlation on the resulting rate. Comparison of the theoretical expression with numerical simulation gives a satisfactory agreement and shows that by increasing the degree of external noise correlation one can enhance the escape rate through the dressed effective noise strength.
Banik Suman Kumar
Chattopadhyay Sudip
Chaudhuri Jyotipratim Ray
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