Rectifying fluctuations in an optical lattice.
We have realized a Brownian motor by using cold atoms in a dissipative optical lattice as a model system. In our experiment the optical potential is spatially symmetric and the time symmetry of the system is broken by applying appropriate zero-mean ac forces. We identify a regime of rectification of forces and a regime of rectification of fluctuations, the latter corresponding to the realization of a Brownian motor.
Jones
P H
PH
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
Goonasekera
M
M
Renzoni
F
F