Gating ratchet for cold atoms.
We demonstrate experimentally a gating ratchet with cold rubidium atoms in a driven near-resonant optical lattice. A single-harmonic periodic modulation of the optical potential depth is applied, together with a single-harmonic rocking force. Directed motion is observed as a result of the breaking of the symmetries of the system.
Gommers
R
R
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
Lebedev
V
V
Brown
M
M
Renzoni
F
F