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Title: Transient pattern formation in an active matter contact poisoning model

Abstract

Abstract One of the most notable features in repulsive particle based active matter systems is motility-induced-phase separation (MIPS) where a dense, often crystalline phase and low density fluid coexist. Most active matter studies involve time-dependent activity; however, there are many active systems where individual particles transition from living or moving to dead or nonmotile due to lack of fuel, infection, or poisoning. Here we consider an active matter particle system at densities where MIPS does not occur. When we add a small number of infected particles that can poison other particles, rendering them nonmotile, we find a rich variety of time dependent pattern formation, including MIPS, a wetting phase, and a fragmented state formed when mobile particles plow through a nonmotile packing. We map the patterns as a function of time scaled by epidemic duration, and show that the pattern formation is robust for a wide range of poisoning rates and activity levels. We also show that pattern formation does not occur in a random death model, but requires the promotion of nucleation by contact poisoning. Our results should be relevant to biological and active matter systems where there is some form of poisoning, death, or transition to nonmotility.

Authors:
ORCiD logo; ; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
2202303
Alternate Identifier(s):
OSTI ID: 2329245
Report Number(s):
LA-UR-23-24342
Journal ID: ISSN 2399-3650; 294; PII: 1387
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
Communications Physics
Additional Journal Information:
Journal Name: Communications Physics Journal Volume: 6 Journal Issue: 1; Journal ID: ISSN 2399-3650
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Mathematics

Citation Formats

Forgács, Péter, Libál, András, Reichhardt, Charles, Hengartner, Nicolas, and Reichhardt, Cynthia J. O. Transient pattern formation in an active matter contact poisoning model. United Kingdom: N. p., 2023. Web. doi:10.1038/s42005-023-01387-7.
Forgács, Péter, Libál, András, Reichhardt, Charles, Hengartner, Nicolas, & Reichhardt, Cynthia J. O. Transient pattern formation in an active matter contact poisoning model. United Kingdom. https://doi.org/10.1038/s42005-023-01387-7
Forgács, Péter, Libál, András, Reichhardt, Charles, Hengartner, Nicolas, and Reichhardt, Cynthia J. O. Sat . "Transient pattern formation in an active matter contact poisoning model". United Kingdom. https://doi.org/10.1038/s42005-023-01387-7.
@article{osti_2202303,
title = {Transient pattern formation in an active matter contact poisoning model},
author = {Forgács, Péter and Libál, András and Reichhardt, Charles and Hengartner, Nicolas and Reichhardt, Cynthia J. O.},
abstractNote = {Abstract One of the most notable features in repulsive particle based active matter systems is motility-induced-phase separation (MIPS) where a dense, often crystalline phase and low density fluid coexist. Most active matter studies involve time-dependent activity; however, there are many active systems where individual particles transition from living or moving to dead or nonmotile due to lack of fuel, infection, or poisoning. Here we consider an active matter particle system at densities where MIPS does not occur. When we add a small number of infected particles that can poison other particles, rendering them nonmotile, we find a rich variety of time dependent pattern formation, including MIPS, a wetting phase, and a fragmented state formed when mobile particles plow through a nonmotile packing. We map the patterns as a function of time scaled by epidemic duration, and show that the pattern formation is robust for a wide range of poisoning rates and activity levels. We also show that pattern formation does not occur in a random death model, but requires the promotion of nucleation by contact poisoning. Our results should be relevant to biological and active matter systems where there is some form of poisoning, death, or transition to nonmotility.},
doi = {10.1038/s42005-023-01387-7},
journal = {Communications Physics},
number = 1,
volume = 6,
place = {United Kingdom},
year = {Sat Oct 14 00:00:00 EDT 2023},
month = {Sat Oct 14 00:00:00 EDT 2023}
}

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