Effect of Partial Absorption on Diffusion with Resetting

Justin Whitehouse, Martin R. Evans, Satya N. Majumdar

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of partial absorption on a diffusive particle which stochastically resets its position with a finite rate $r$ is considered. The particle is absorbed by a target at the origin with absorption `velocity' $a$; as the velocity $a$ approaches $\infty$ the absorption property of the target approaches that of a perfectly-absorbing target. The effect of partial absorption on first-passage time problems is studied, in particular, it is shown that the mean time to absorption (MTA) is increased by an additive term proportional to $1/a$. The results are extended to multiparticle systems where independent searchers, initially uniformly distributed with a given density, look for a single immobile target. It is found that the average survival probability $P^{av}$ is modified by a multiplicative factor which is a function of $1/a$, whereas the decay rate of the typical survival probability $P^{typ}$ is decreased by an additive term proportional to $1/a$.
Original languageEnglish
Article number022118
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Volume87
Issue number2
DOIs
Publication statusPublished - 15 Feb 2013

Keywords

  • cond-mat.stat-mech

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