High-order resonances of the quantum δ-kicked accelerator
Department of Physics, Oklahoma State University - Stillwater, OK 74078-3072, USA
2 Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology - Cambridge, MA 02139, USA
Corresponding author: email@example.com
Accepted: 19 January 2010
We report the observation of high-order resonances of the quantum δ-kicked accelerator using a BEC kicked by a standing wave of light. The signature of these resonances is the existence of quantum accelerator modes. For the first time quantum accelerator modes were seen near 1/2, 2/3 and 1/3 of the half-Talbot time. Using a BEC enabled the internal momentum state structure of the modes and resonances to be studied for the first time. This structure has many similarities to that present in the fractional Talbot effect. We present a theory for this system based on rephasing of momentum orders and apply it to predict the behavior of the accelerator modes around a resonance of any order.
PACS: 37.10.Jk – Atoms in optical lattices / 05.45.Mt – Quantum chaos; semiclassical methods
© EPLA, 2010