From Brownian motor to Brownian refrigerator

Chris Van den Broeck, Hasselt University, Belgium

Onsager symmetry implies that a Brownian motor, driven by a temperature gradient, will also perform a refrigerator function upon loading. We analytically calculate the corresponding heat flux for an exactly solvable microscopic model and compare it with molecular dynamics simulations. We show that, by a combination of the motor and refrigeration function, it is in principle possible to achieve Carnot effiency.

References:
C. Van den Broeck, R. Kawai and P. Meurs, Phys. Rev. Lett. 93, 090601 (2004).
C. Van den Broeck, P. Meurs and R. Kawai, New J. Phys. 7, 10 (2005).
C. Van den Broeck, Phys. Rev. Lett. 95, 190602 (2005).
C. Van den Broeck, Carnot efficiency revisited, to appear Adv. Chem. Phys.
C. Van den Broeck and R. Kawai, From Brownian motor to Brownian refrigerator, cond-mat/0602153.