Depolarisation cooling of an atomic cloud

Abstract

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

8 pages, 5 figures

References in corpus (2)

• Bose-Einstein condensation of chromium
• Dipolar Relaxation in an ultra-cold Gas of magnetically trapped chromium atoms

Cited by in corpus (12)

• The physics of dipolar bosonic quantum gases
• Dipolar physics: A review of experiments with magnetic quantum gases
• Damagnetization cooling of a gas
• Controlling interactions between highly-magnetic atoms with Feshbach resonances
• Short Time Cycles of Purely Quantum Refrigerators
• Production of a chromium Bose-Einstein condensate
• The minimal temperature of Quantum Refrigerators
• Efficient demagnetization cooling of atoms and its limits
• Heat transfer through dipolar coupling: Sympathetic cooling without contact
• Optimization of collisional Feshbach cooling of an ultracold nondegenerate gas
• Photoassociation of spin polarized Chromium
• Transport of magnetically sensitive atoms in a magnetic environment