The steady state quantum statistics of a non-Markovian atom laser

Details The steady state quantum statistics of a non-Markovian atom laser The steady state quantum statistics of a non-Markovian atom laser

1999-07-02

arxiv.org/abs/cond-mat/9907023v1

Physics

Condensed Matter

14 pages (twocloumn), 6 figures

Scientific paper

10.1103/PhysRevA.61.023603

We present a fully quantum mechanical treatment of a single-mode atomic cavity with a pumping mechanism and an output coupling to a continuum of external modes. This system is a schematic description of an atom laser. In the dilute limit where atom-atom interactions are negligible, we have been able to solve this model without making the Born and Markov approximations. When coupling into free space, it is shown that for reasonable parameters there is a bound state which does not disperse, which means that there is no steady state. This bound state does not exist when gravity is included, and in that case the system reaches a steady state. We develop equations of motion for the two-time correlation in the presence of pumping and gravity in the output modes. We then calculate the steady-state output energy flux from the laser.

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