Escape rate of an active Brownian particle over a potential barrier

摘要

We study the dynamics of an active Brownian particle with a nonlinearfriction function located in a spatial cubic potential. For strong but finitedamping, the escape rate of the particle over the spatial potential barriershows a nonmonotonic dependence on the noise intensity. We relate this behaviorto the fact that the active particle escapes from a limit cycle rather thanfrom a fixed point and that a certain amount of noise can stabilize the sojournof the particle on this limit cycle.