Volume 130, Number 6, June 2020
|Number of page(s)||7|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||21 July 2020|
A novel approach to chemotaxis: Active particles guided by internal clocks
1 Université Côte d'Azur, Laboratoire J. A. Dieudonné, UMR 7351 CNRS - Parc Valrose, F-06108 Nice Cedex 02, France
2 Institut für Physik und Astronomie, Universität Potsdam - Karl-Liebknecht-Strasse 24/25, Haus 28, D-14476 Potsdam, Germany
Received: 30 March 2020
Accepted: 22 June 2020
Motivated by the observation of non-exponential run-time distributions of bacterial swimmers, we propose a minimal phenomenological model for taxis of active particles whose motion is controlled by an internal clock. The ticking of the clock depends on an external concentration field, e.g., a chemical substance. We demonstrate that these particles can detect concentration gradients and respond to them by moving up- or down-gradient depending on the clock design, albeit measurements of these fields are purely local in space and instantaneous in time. Altogether, our results open a new route in the study of directional navigation: we show that the use of a clock to control motility actions represents a generic and versatile toolbox to engineer behavioral responses to external cues, such as light, chemical, or temperature gradients.
PACS: 87.17.Jj – Cell locomotion, chemotaxis / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.10.-a – Computational methods in statistical physics and nonlinear dynamics
© EPLA, 2020
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