Volume 81, Number 2, January 2008
Article Number 24003
Number of page(s) 6
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
Published online 14 December 2007
EPL, 81 (2008) 24003
DOI: 10.1209/0295-5075/81/24003

Nonlinear control of chaotic walking of atoms in an optical lattice

V. Yu. Argonov and S. V. Prants

Laboratory of Nonlinear Dynamical Systems, Pacific Oceanological Institute of the Russian Academy of Sciences 43 Baltiiskaya st., 690041 Vladivostok, Russia

received 27 August 2007; accepted in final form 19 November 2007; published January 2008
published online 14 December 2007

Near the resonance, centre-of-mass atomic motion in an optical lattice is shown to be a chaotic walking due to the interplay between coherent internal atomic dynamics and spontaneous emission. Statistical properties of chaotic atomic motion can be controlled by a single parameter, the detuning between the atomic transition frequency and the laser frequency. We derive a Fokker-Planck equation in the energetic space to describe the atomic transport near the resonance and demonstrate numerically how to manipulate the atomic motion varying the detuning.

42.50.Vk - Mechanical effects of light on atoms, molecules, electrons, and ions.
05.40.Fb - Random walks and Levy flights.
05.45.-a - Nonlinear dynamics and chaos.

© EPLA 2008