Generalized thermodynamics of phase equilibria in scalar active matter
(2018) In Physical Review E 97(2).- Abstract
Motility-induced phase separation (MIPS) arises generically in fluids of self-propelled particles when interactions lead to a kinetic slowdown at high densities. Starting from a continuum description of scalar active matter akin to a generalized Cahn-Hilliard equation, we give a general prescription for the mean densities of coexisting phases in flux-free steady states that amounts, at a hydrodynamics scale, to extremizing an effective free energy. We illustrate our approach on two well-known models: self-propelled particles interacting either through a density-dependent propulsion speed or via direct pairwise forces. Our theory accounts quantitatively for their phase diagrams, providing a unified description of MIPS.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/773ff640-4e35-49bd-b13b-cfb478ef163e
- author
- Solon, Alexandre P. ; Stenhammar, Joakim LU ; Cates, Michael E. ; Kafri, Yariv and Tailleur, Julien
- organization
- publishing date
- 2018-02-20
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review E
- volume
- 97
- issue
- 2
- article number
- 020602
- publisher
- American Physical Society
- external identifiers
-
- scopus:85042231571
- pmid:29548246
- ISSN
- 2470-0045
- DOI
- 10.1103/PhysRevE.97.020602
- language
- English
- LU publication?
- yes
- id
- 773ff640-4e35-49bd-b13b-cfb478ef163e
- alternative location
- https://arxiv.org/abs/1609.03483
- date added to LUP
- 2018-03-06 08:21:22
- date last changed
- 2024-04-15 03:11:53
@article{773ff640-4e35-49bd-b13b-cfb478ef163e,
abstract = {{<p>Motility-induced phase separation (MIPS) arises generically in fluids of self-propelled particles when interactions lead to a kinetic slowdown at high densities. Starting from a continuum description of scalar active matter akin to a generalized Cahn-Hilliard equation, we give a general prescription for the mean densities of coexisting phases in flux-free steady states that amounts, at a hydrodynamics scale, to extremizing an effective free energy. We illustrate our approach on two well-known models: self-propelled particles interacting either through a density-dependent propulsion speed or via direct pairwise forces. Our theory accounts quantitatively for their phase diagrams, providing a unified description of MIPS.</p>}},
author = {{Solon, Alexandre P. and Stenhammar, Joakim and Cates, Michael E. and Kafri, Yariv and Tailleur, Julien}},
issn = {{2470-0045}},
language = {{eng}},
month = {{02}},
number = {{2}},
publisher = {{American Physical Society}},
series = {{Physical Review E}},
title = {{Generalized thermodynamics of phase equilibria in scalar active matter}},
url = {{http://dx.doi.org/10.1103/PhysRevE.97.020602}},
doi = {{10.1103/PhysRevE.97.020602}},
volume = {{97}},
year = {{2018}},
}