{
  "id": "1609.03483",
  "version": "v1",
  "published": "2016-09-12T16:57:55.000Z",
  "updated": "2016-09-12T16:57:55.000Z",
  "title": "Generalized Thermodynamics of Phase Equilibria in Scalar Active Matter",
  "authors": [
    "Alexandre P. Solon",
    "Joakim Stenhammar",
    "Michael E. Cates",
    "Yariv Kafri",
    "Julien Tailleur"
  ],
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.soft"
  ],
  "abstract": "Motility-induced phase separation (MIPS) arises generically in fluids of self-propelled particles when interactions lead to a kinetic slowdown at high density. Starting from a continuum description of diffusive scalar active matter, we give a general prescription for phase equilibria that amounts, at a hydrodynamics scale, to extremalizing a generalized 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, and explains their qualitatively different behavior when changing ensembles from isochoric to isobaric.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-09-12T16:57:55.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "scalar active matter",
      "phase equilibria",
      "generalized thermodynamics",
      "self-propelled particles",
      "motility-induced phase separation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}