Target competition for resources under multiple search-and-capture events with stochastic resetting
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Accepted version
Author(s)
Bressloff, PC
Type
Journal Article
Abstract
We develop a general framework for analysing the distribution of resources in a population of targets under multiple independent search-and-capture events. Each event involves a single particle executing a stochastic search that resets to a fixed location xr at a random sequence of times. Whenever the particle is captured by a target, it delivers a packet of resources and then returns to xr, where it is reloaded with cargo and a new round of search and capture begins. Using renewal theory, we determine the mean number of resources in each target as a function of the splitting probabilities and unconditional mean first passage times of the corresponding search process without resetting. We then use asymptotic PDE methods to determine the effects of resetting on the distribution of resources generated by diffusive search in a bounded two-dimensional domain with N small interior targets. We show that slow resetting increases the total number of resources Mtot across all targets provided that ∑Nj=1G(xr,xj)<0
, where G is the Neumann Green’s function and xj is the location of the j-th target. This implies that Mtot can be optimized by varying r. We also show that the k-th target has a competitive advantage if ∑Nj=1G(xr,xj)>NG(xr,xk)
.
, where G is the Neumann Green’s function and xj is the location of the j-th target. This implies that Mtot can be optimized by varying r. We also show that the k-th target has a competitive advantage if ∑Nj=1G(xr,xj)>NG(xr,xk)
.
Date Issued
2020-10
Date Acceptance
2020-09-15
Citation
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020, 476 (2242)
ISSN
1364-5021
Publisher
The Royal Society
Journal / Book Title
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume
476
Issue
2242
Copyright Statement
© The Authors. Published by the Royal Society under the terms of the
Creative Commons Attribution License http://creativecommons.org/licenses/
by/4.0/, which permits unrestricted use, provided the original author and
source are credited.
Creative Commons Attribution License http://creativecommons.org/licenses/
by/4.0/, which permits unrestricted use, provided the original author and
source are credited.
License URL
Identifier
http://dx.doi.org/10.1098/rspa.2020.0475
Publication Status
Published
Date Publish Online
2020-10-14