Depolarisation cooling of an atomic cloud

Details Depolarisation cooling of an atomic cloud Depolarisation cooling of an atomic cloud

2005-05-13

arxiv.org/abs/quant-ph/0505096v1

Physics

Quantum Physics

8 pages, 5 figures

Scientific paper

10.1209/epl/i2005-10181-4

We propose a cooling scheme based on depolarisation of a polarised cloud of trapped atoms. Similar to adiabatic demagnetisation, we suggest to use the coupling between the internal spin reservoir of the cloud and the external kinetic reservoir via dipolar relaxation to reduce the temperature of the cloud. By optical pumping one can cool the spin reservoir and force the cooling process. In case of a trapped gas of dipolar chromium atoms, we show that this cooling technique can be performed continuously and used to approach the critical phase space density for BEC

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