Arrival time for the fastest among N switching stochastic particles

S. Toste and D. Holcman ()
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S. Toste: IBENS, Ecole Normale Superieure-PSL
D. Holcman: IBENS, Ecole Normale Superieure-PSL

The European Physical Journal B: Condensed Matter and Complex Systems, 2022, vol. 95, issue 7, 1-25

Abstract: Abstract The first arrivals among N Brownian particles is ubiquitous in the life sciences, as it often triggers cellular processes from the molecular level. We study here the case where stochastic particles, which represent proteins or molecules can switch between two states inside the non-negative real line. The switching process is modeled as a two-state Markov chain and particles can only escape in state 1. We estimate the fastest arrival time by solving asymptotically the Fokker–Planck equations for three different initial distributions: Dirac-delta, uniformly distributed and long-tail decay. The derived formulas reveal that the fastest particle avoids switching when the switching rates are much smaller than the diffusion time scale, but switches twice when the diffusion in state 2 is much faster than in state 1. The present results are compared to stochastic simulations revealing the range of validity of the derived formulas. Graphic abstract

Date: 2022
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DOI: 10.1140/epjb/s10051-022-00366-1

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