NDLI: Collective transport for active matter run-and-tumble disk systems on a traveling-wave substrate.

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Year: 2017 Volume: 95

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Collective transport for active matter run-and-tumble disk systems on a traveling-wave substrate.

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Collective transport for active matter run-and-tumble disk systems on a traveling-wave substrate.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sándor, Cs Libál, A. Reichhardt, C. Reichhardt, C. J. Olson
Description	Country affiliation: United States Author Affiliation: Sándor C ( Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.); Libál A ( Mathematics and Computer Science Department, Babes-Bolyai University, Cluj 400084, Romania.); Reichhardt C ( Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.); Reichhardt CJ ( Mathematics and Computer Science Department, Babes-Bolyai University, Cluj 400084, Romania.)
Abstract	We examine numerically the transport of an assembly of active run-and-tumble disks interacting with a traveling-wave substrate. We show that as a function of substrate strength, wave speed, disk activity, and disk density, a variety of dynamical phases arise that are correlated with the structure and net flux of disks. We find that there is a sharp transition into a state in which the disks are only partially coupled to the substrate and form a phase-separated cluster state. This transition is associated with a drop in the net disk flux, and it can occur as a function of the substrate speed, maximum substrate force, disk run time, and disk density. Since variation of the disk activity parameters produces different disk drift rates for a fixed traveling-wave speed on the substrate, the system we consider could be used as an efficient method for active matter species separation. Within the cluster phase, we find that in some regimes the motion of the cluster center of mass is in the opposite direction to that of the traveling wave, while when the maximum substrate force is increased, the cluster drifts in the direction of the traveling wave. This suggests that swarming or clustering motion can serve as a method by which an active system can collectively move against an external drift.
File Format	HTM / HTML
ISSN	24700045
e-ISSN	24700053
Journal	Physical Review E
Issue Number	1-1
Volume Number	95
Language	English
Publisher	American Physical Society
Publisher Date	2017-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Statistical and Nonlinear Physics many-body systems Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Statistics and Probability Statistical and Nonlinear Physics Condensed Matter Physics

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