Damagnetization cooling of a gas
arXiv:cond-mat/0610498 · doi:10.1038/nphys443
Abstract
We demonstrate demagnetization cooling of a gas of ultracold Cr atoms. Demagnetization is driven by inelastic dipolar collisions which couple the motional degrees of freedom to the spin degree. By that kinetic energy is converted into magnetic work with a consequent temperature reduction of the gas. Optical pumping is used to magnetize the system and drive continuous demagnetization cooling. Applying this technique, we can increase the phase space density of our sample by one order of magnitude, with nearly no atom loss. This method can be in principle extended to every dipolar system and could be used to achieve quantum degeneracy via optical means.
10 pages, 5 figures
References in corpus (3)
Cited by in corpus (52)
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