skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on April 20, 2019

Title: Phase separation and large deviations of lattice active matter

Off-lattice active Brownian particles form clusters and undergo phase separation even in the absence of attractions or velocity-alignment mechanisms. Arguments that explain this phenomenon appeal only to the ability of particles to move persistently in a direction that fluctuates, but existing lattice models of hard particles that account for this behavior do not exhibit phase separation. Here we present a lattice model of active matter that exhibits motility-induced phase separation in the absence of velocity alignment. Using direct and rare-event sampling of dynamical trajectories, we show that clustering and phase separation are accompanied by pronounced fluctuations of static and dynamic order parameters. In conclusion, this model provides a complement to off-lattice models for the study of motility-induced phase separation.
Authors:
 [1] ; ORCiD logo [2] ;  [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 148; Journal Issue: 15; Related Information: © 2018 Author(s).; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1462977
Alternate Identifier(s):
OSTI ID: 1434178

Whitelam, Stephen, Klymko, Katherine, and Mandal, Dibyendu. Phase separation and large deviations of lattice active matter. United States: N. p., Web. doi:10.1063/1.5023403.
Whitelam, Stephen, Klymko, Katherine, & Mandal, Dibyendu. Phase separation and large deviations of lattice active matter. United States. doi:10.1063/1.5023403.
Whitelam, Stephen, Klymko, Katherine, and Mandal, Dibyendu. 2018. "Phase separation and large deviations of lattice active matter". United States. doi:10.1063/1.5023403.
@article{osti_1462977,
title = {Phase separation and large deviations of lattice active matter},
author = {Whitelam, Stephen and Klymko, Katherine and Mandal, Dibyendu},
abstractNote = {Off-lattice active Brownian particles form clusters and undergo phase separation even in the absence of attractions or velocity-alignment mechanisms. Arguments that explain this phenomenon appeal only to the ability of particles to move persistently in a direction that fluctuates, but existing lattice models of hard particles that account for this behavior do not exhibit phase separation. Here we present a lattice model of active matter that exhibits motility-induced phase separation in the absence of velocity alignment. Using direct and rare-event sampling of dynamical trajectories, we show that clustering and phase separation are accompanied by pronounced fluctuations of static and dynamic order parameters. In conclusion, this model provides a complement to off-lattice models for the study of motility-induced phase separation.},
doi = {10.1063/1.5023403},
journal = {Journal of Chemical Physics},
number = 15,
volume = 148,
place = {United States},
year = {2018},
month = {4}
}