期刊
PHYSICAL REVIEW E
卷 97, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.97.020602
关键词
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资金
- PLS fellowship from the Gordon and Betty Moore Foundation
- Swedish Research Council [2015-05449]
- Royal Society
- EPSRC [EP/J007404]
- I-CORE Program of the Planning and Budgeting Committee of the Israel Science Foundation
- Israel Science Foundation
- ANR
- CNRS-MOST travel grant
- EPSRC [EP/J007404/1] Funding Source: UKRI
- Swedish Research Council [2015-05449] Funding Source: Swedish Research Council
- Engineering and Physical Sciences Research Council [EP/J007404/1] Funding Source: researchfish
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.
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