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Issue 26, 2020
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First passage of an active particle in the presence of passive crowders

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Abstract

We experimentally study the stochastic transport of a self-propelled camphor boat, driven by Marangoni forces, through a crowd of passive paper discs floating on water. We analyze the statistics of the first passage times of the active particle to travel from the center of a circular container to its boundary. While the mean times rise monotonically as a function of the covered area fraction ϕ of the passive paper discs, their fluctuations show a non-monotonic behavior – being higher at low and high value of ϕ compared to intermediate values. The reason is traced to an interplay of two distinct sources of fluctuations – one intrinsic to the dynamics, while the other due to the crowding.

Graphical abstract: First passage of an active particle in the presence of passive crowders

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Supplementary files

Article information


Submitted
27 Feb 2020
Accepted
18 May 2020
First published
25 May 2020

Soft Matter, 2020,16, 6138-6144
Article type
Paper

First passage of an active particle in the presence of passive crowders

A. Biswas, J. M. Cruz, P. Parmananda and D. Das, Soft Matter, 2020, 16, 6138
DOI: 10.1039/D0SM00350F

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