Issue
EPL
Volume 85, Number 3, February 2009
Article Number 30005
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/85/30005
Published online 09 February 2009
EPL, 85 (2009) 30005
DOI: 10.1209/0295-5075/85/30005

The initial velocity dependence of the quantum resonance in the delta-kicked rotor

J.-A. Currivan, A. Ullah and M. D. Hoogerland

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

m.hoogerland@auckland.ac.nz

received 3 September 2008; accepted in final form 7 January 2009; published February 2009
published online 9 February 2009

Abstract
The influence of an initial momentum on the appearance of “quantum resonances” in the delta-kicked rotor system is explored experimentally. We show that for certain initial momenta, a resonance can be negated entirely, whereas at others a resonance can be made to appear. At a larger number of kicks, all resonances are shown to narrow. We show that as a consequence, the individual “diffraction peaks” may split. We compare our results to numerical simulations as well as analytical theory.

PACS
05.45.Mt - Quantum chaos; semiclassical methods.
37.10.Vz - Mechanical effects of light on atoms, molecules, and ions.

© EPLA 2009