title: Optimal tuning of a confined Brownian information engine.
abstract: A Brownian information engine is a device extracting mechanical work from a single heat bath by exploiting the information on the state of a Brownian particle immersed in the bath. As for engines, it is important to find the optimal operating condition that yields the maximum extracted work or power. The optimal condition for a Brownian information engine with a finite cycle time τ has been rarely studied because of the difficulty in finding the nonequilibrium steady state. In this study, we introduce a model for the Brownian information engine and develop an analytic formalism for its steady-state distribution for any τ. We find that the extracted work per engine cycle is maximum when τ approaches infinity, while the power is maximum when τ approaches zero.
authors.affiliation: Department of Physics, University of Seoul, Seoul 130-743, Korea.
authors.forename: Jong-Min
authors.initials: JM
authors.lastname: Park
authors.affiliation: School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea.
authors.forename: Jae Sung
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Physics, University of Seoul, Seoul 130-743, Korea.|School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea.
authors.forename: Jae Dong
authors.initials: JD
authors.lastname: Noh