title: Minimal model for Brownian vortexes.
abstract: 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.
authors.affiliation: Department of Physics, Center for Soft Matter Research, New York University, New York, 10003, USA.
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.forename: David G
authors.initials: DG
authors.lastname: Grier
authors.forename: Alexander Y
authors.initials: AY
authors.lastname: Grosberg