The problem of analytical calculation of barrier crossing characteristics for Levy flights

Details The problem of analytical calculation of barrier crossing characteristics for Levy flights The problem of analytical calculation of barrier crossing characteristics for Levy flights

2008-10-10

arxiv.org/abs/0810.1816v1

Physics

Condensed Matter

Statistical Mechanics

12 pages, 2 figures, presented at 5th International Conference on Unsolved Problems on Noise, Lyon, France, 2008, to appear in

Scientific paper

10.1088/1742-5468/2009/01/P01002

By using the backward fractional Fokker-Planck equation we investigate the barrier crossing event in the presence of Levy noise. After shortly review recent results obtained with different approaches on the time characteristics of the barrier crossing, we derive a general differential equation useful to calculate the nonlinear relaxation time. We obtain analytically the nonlinear relaxation time for free Levy flights and a closed expression in quadrature of the same characteristics for cubic potential.

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