Collisional effects on the collective laser cooling of trapped bosonic gases

Details Collisional effects on the collective laser cooling of trapped bosonic gases Collisional effects on the collective laser cooling of trapped bosonic gases

1999-06-18

arxiv.org/abs/quant-ph/9906070v1

Physics

Quantum Physics

9 pages, 5 figures

Scientific paper

10.1007/s003400050821

We analyse the effects of atom-atom collisions on collective laser cooling scheme. We derive a quantum Master equation which describes the laser cooling in presence of atom-atom collisions in the weak-condensation regime. Using such equation, we perform Monte Carlo simulations of the population dynamics in one and three dimensions. We observe that the ground-state laser-induced condensation is maintained in the presence of collisions. Laser cooling causes a transition from a Bose-Einstein distribution describing collisionally induced equilibrium,to a distribution with an effective zero temperature. We analyse also the effects of atom-atom collisions on the cooling into an excited state of the trap.

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