Affordable Access

Information and maximum power in a feedback controlled Brownian ratchet

Authors

Abstract

Closed-loop or feedback controlled ratchets are Brownian motors that operate using information about the state of the system. For these ratchets, we compute the power output and we investigate its relation with the information used in the feedback control. We get analytical expressions for one-particle and few-particle flashing ratchets, and we find that the maximum power output has an upper bound proportional to the information. In addition, we show that the increase of the power output that results from changing the optimal open-loop ratchet to a closed-loop ratchet also has an upper bound that is linear in the information. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

There are no comments yet on this publication. Be the first to share your thoughts.