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Title: Run-and-tumble particles in two dimensions under stochastic resetting conditions
Authors: Santra, Ion
Basu, Urna
Sabhapandit, Sanjib
Keywords: active matter
exact results
Issue Date: Nov-2020
Publisher: IOP Publishing and SISSA
Citation: Journal of Statistical Mechanics:Theory and Experiment, 2020, Article No.113206
Abstract: We study the effect of stochastic resetting on a run and tumble particle (RTP) in two spatial dimensions. We consider a resetting protocol which affects both the position and orientation of the RTP: with a constant rate the particle undergoes a positional resetting to a fixed point in space and orientation randomization. We compute the radial and x -marginal stationary state distributions and show that while the former approaches a constant value as r→0 , the latter diverges logarithmically as x→0 . On the other hand, both the marginal distributions decay exponentially with the same exponent far away from the origin. We also study the temporal relaxation of the RTP and show that the position distribution undergoes a dynamical transition to a stationary state. We also study the first passage properties of the RTP in the presence of the resetting and show that the optimization of the resetting rate can minimize the mean first passage time. We also give a brief discussion on the stationary states for resetting to the initial position with fixed orientation.
Description: Restricted Access
ISSN: 1742-5468
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Copyright: 2020, IOP Publishing and SISSA
Appears in Collections:Research Papers (TP)

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