{
  "id": "1203.0184",
  "version": "v3",
  "published": "2012-03-01T13:55:09.000Z",
  "updated": "2012-04-06T07:56:16.000Z",
  "title": "Efficiency of a Brownian information machine",
  "authors": [
    "Michael Bauer",
    "David Abreu",
    "Udo Seifert"
  ],
  "comment": "9 pages, 2 figures",
  "journal": "J. Phys. A: Math. Theor. 45 (2012) 162001",
  "doi": "10.1088/1751-8113/45/16/162001",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "A Brownian information machine extracts work from a heat bath through a feedback process that exploits the information acquired in a measurement. For the paradigmatic case of a particle trapped in a harmonic potential, we determine how power and efficiency for two variants of such a machine operating cyclically depend on the cycle time and the precision of the positional measurements. Controlling only the center of the trap leads to a machine that has zero efficiency at maximum power whereas additional optimal control of the stiffness of the trap leads to an efficiency bounded between 1/2, which holds for maximum power, and 1 reached even for finite cycle time in the limit of perfect measurements.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2012-04-06T07:56:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "efficiency",
      "brownian information machine extracts work",
      "maximum power",
      "finite cycle time",
      "additional optimal control"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Journal of Physics A Mathematical General",
      "year": 2012,
      "month": "Apr",
      "volume": 45,
      "number": 16,
      "pages": 162001
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012JPhA...45p2001B"
    }
  }
}