Ultracold Fermion Cooling Cycle using Heteronuclear Feshbach Resonances
M. A. Morales, N. Nygaard, J. E. Williams, Charles W. Clark
Abstract
We consider an ideal gas of Bose and Fermi atoms in a harmonic trap, with a Feshbach resonance in the interspecies atomic scattering that can lead to formation of fermionic molecules. We map out the phase diagram for this three-component mixture in chemical and thermal equilibrium. Considering adiabatic association and dissociation of the molecules, we identify a possible cooling cycle, which in ideal circumstances can yield an exponential increase of the phase-space density.
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