{
  "id": "1706.03585",
  "version": "v1",
  "published": "2017-06-12T12:04:08.000Z",
  "updated": "2017-06-12T12:04:08.000Z",
  "title": "Clausius relation for active particles: what can we learn from fluctuations?",
  "authors": [
    "Andrea Puglisi",
    "Umberto Marini Bettolo Marconi"
  ],
  "comment": "10 pages, submitted to Entropy journal for the special issue \"Thermodynamics and Statistical Mechanics of Small Systems\" (see http://www.mdpi.com/journal/entropy/special_issues/small_systems)",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "Many kinds of active particles, such as bacteria or active colloids, move in a thermostatted fluid by means of self-propulsion. Energy injected by such a non-equilibrium force is eventually dissipated as heat in the thermostat. Since thermal fluctuations are much faster and weaker than self-propulsion forces, they are often neglected, blurring the identification of dissipated heat in theoretical models. For the same reason, some freedom - or arbitrariness - appears when defining entropy production. Recently three different recipes to define heat and entropy production have been proposed for the same model where the role of self-propulsion is played by a Gaussian coloured noise. Here we compare and discuss the relation between such proposals and their physical meaning. One of these proposals takes into account the heat exchanged with a non-equilibrium active bath: such an \"active heat\" satisfies the original Clausius relation and can be experimentally verified.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-06-12T12:04:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "active particles",
      "original clausius relation",
      "non-equilibrium force",
      "thermal fluctuations",
      "self-propulsion forces"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}