Volume 79, Number 6, September 2007
Article Number 60006
Number of page(s) 4
Section General
Published online 29 August 2007
EPL, 79 (2007) 60006
DOI: 10.1209/0295-5075/79/60006

Short-time energies in the atom optics kicked rotor

S. A. Wayper, W. Simpson and M. D. Hoogerland

Department of Physics, University of Auckland - Private Bag 92019, Auckland, New Zealand

received 13 April 2007; accepted in final form 2 August 2007; published September 2007
published online 29 August 2007

We experimentally verify the analytical expressions that exist for the diffusion rate in the quantum delta kicked rotor system for small numbers of kicks. We show development of diffusion resonances from two to five kicks, and of multiple resonances for high kick strengths. Furthermore, we show that, in contrast to classical predictions, the results are purely periodic in the kick period, and reproduce the predicted quantum and diffusion resonances.

05.45.Mt - Quantum chaos; semiclassical methods.
32.80.Lg - Mechanical effects of light on atoms, molecules, and ions.

© Europhysics Letters Association 2007