Minimal model for Brownian vortexes

Bo Sun, David G. Grier, Alexander Y. Grosberg

    Research output: Contribution to journalArticlepeer-review


    A Brownian vortex is a noise-driven machine that uses thermal fluctuations to extract a steady-state flow of work from a static force field. Its operation is characterized by loops in a probability current whose topology and direction can change with changes in temperature. We present discrete three- and four-state minimal models for Brownian vortexes that can be solved exactly with a master-equation formalism. These models elucidate conditions required for flux reversal in Brownian vortexes and provide insights into their thermodynamic efficiency through the rate of entropy production.

    Original languageEnglish (US)
    Article number021123
    JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    Issue number2
    StatePublished - Aug 25 2010

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Statistics and Probability
    • Condensed Matter Physics


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