Anomalous mobility of a driven active particle in a steady laminar flow

Journal of Physics. Condensed Matter : an Institute of Physics Journal
F CecconiA Vulpiani

Abstract

We study, via extensive numerical simulations, the force-velocity curve of an active particle advected by a steady laminar flow, in the nonlinear response regime. Our model for an active particle relies on a colored noise term that mimics its persistent motion over a time scale [Formula: see text]. We find that the active particle dynamics shows non-trivial effects, such as negative differential and absolute mobility (NDM and ANM, respectively). We explore the space of the model parameters and compare the observed behaviors with those obtained for a passive particle ([Formula: see text]) advected by the same laminar flow. Our results show that the phenomena of NDM and ANM are quite robust with respect to the details of the considered noise: in particular for finite [Formula: see text] a more complex force-velocity relation can be observed.

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Citations

May 30, 2020·Soft Matter·Lorenzo CapriniAlessandro Sarracino
Apr 27, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Paolo MalgarettiJulian Talbot
Nov 6, 2018·The Journal of Chemical Physics·Bao-Quan AiWei-Rong Zhong
Sep 14, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·O BénichouR Voituriez

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