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114384 |
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|a Stenhammar, Joakim
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|a Massachusetts Institute of Technology. Department of Physics
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|a Solon, Alexandre
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|a Cates, Michael E.
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|a Kafri, Yariv
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|a Tailleur, Julien
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|a Solon, Alexandre
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|a Generalized thermodynamics of phase equilibria in scalar active matter
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|b American Physical Society,
|c 2018-03-27T14:20:59Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/114384
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|a 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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|a Article
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|t Physical Review E
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