Escape rate of an active Brownian particle over a potential barrier

Details Escape rate of an active Brownian particle over a potential barrier Escape rate of an active Brownian particle over a potential barrier

2012-03-30

arxiv.org/abs/1203.6814v1

Phys. Rev. E 85, 032102 (2012)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.85.032102

We study the dynamics of an active Brownian particle with a nonlinear friction function located in a spatial cubic potential. For strong but finite damping, the escape rate of the particle over the spatial potential barrier shows a nonmonotonic dependence on the noise intensity. We relate this behavior to the fact that the active particle escapes from a limit cycle rather than from a fixed point and that a certain amount of noise can stabilize the sojourn of the particle on this limit cycle.

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