Efficiency of Brownian motors
Departamento de Física Atómica, Nuclear y Molecular, Universidad Complutense de Madrid - 28040-Madrid, Spain
2 Departamento de Física Aplicada I, Universidad Complutense de Madrid, 28040-Madrid, Spain
Accepted: 12 June 1998
The efficiency of different types of Brownian motors is calculated analytically and numerically. We find that motors based on flashing ratchets present a low efficiency and an unavoidable entropy production. On the other hand, a certain class of motors based on adiabatically changing potentials, named reversible ratchets, exhibit a higher efficiency and the entropy production can be arbitrarily reduced.
PACS: 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion / 82.20.Mj – Non-equilibrium kinetics
© EDP Sciences, 1998