1.
Phys Rev Lett
; 98(7): 073002, 2007 Feb 16.
Article
in English
| MEDLINE
| ID: mdl-17359021
ABSTRACT
We report an experimental investigation of momentum diffusion in the delta-function kicked rotor where time symmetry is broken by a two-period kicking cycle and spatial symmetry by an alternating linear potential. We exploit this, and a technique involving a moving optical potential, to create an asymmetry in the momentum diffusion that is due to the classical chaotic diffusion. This represents a realization of a type of Hamiltonian quantum ratchet.