title: Chaotic filtering of moving atoms in pulsed optical lattices by control of dynamical localization.
abstract: We propose a mechanism for a velocity-selective device which would allow packets of cold atoms traveling in one direction through a pulsed optical lattice to pass undisturbed, while dispersing atoms traveling in the opposite direction. The mechanism is generic and straightforward: for a simple quantum kicked rotor pulsed with unequal periods, the quantum suppression of momentum diffusion (dynamical localization) yields momentum localization lengths L which are no longer isotropic, as in the standard case, but vary smoothly and controllably with initial momentum.
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: T
authors.initials: T
authors.lastname: Jonckheere
authors.forename: M R
authors.initials: MR
authors.lastname: Isherwood
authors.forename: T S
authors.initials: TS
authors.lastname: Monteiro