A Bose-Einstein condensate driven by a kicked rotor in a finite boxK. Henderson1, 2, H. Kelkar1, 2, T. C. Li1, 2, B. Gutiérrez-Medina1, 2 and M. G. Raizen1, 2
1 Center for Nonlinear Dynamics - The University of Texas at Austin Austin, TX 78712-1081, USA
2 Department of Physics, The University of Texas at Austin Austin TX 78712-1081, USA
received 13 March 2006; accepted in final form 10 June 2006
published online 7 July 2006
We study the effect of different heating rates on a dilute Bose gas confined in a quasi-1D finite, leaky box. An optical kicked rotor is used to transfer energy to the atoms while two repulsive optical beams are used to confine the atoms. The average energy of the atoms is localized after a large number of kicks and the system reaches a nonequilibrium steady state. A numerical simulation of the experimental data suggests that the localization is due to energetic atoms leaking over the barrier. Our data also indicates a correlation between collisions and the destruction of the Bose-Einstein condensate fraction.
05.20.Dd - Kinetic theory.
03.75.Hh - Static properties of condensates; thermodynamical, statistical, and structural properties.
05.70.Ln - Nonequilibrium and irreversible thermodynamics.
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