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Ultracold Fermion Cooling Cycle Using Heteronuclear Feshbach Resonances



M A. Morales, N Nygaard, J E. Williams, Charles W. Clark


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.
New Journal of Physics


Bose-Ferm mixture, cooling cycle, Feshbach resonance, molecules


Morales, M. , Nygaard, N. , Williams, J. and Clark, C. (2005), Ultracold Fermion Cooling Cycle Using Heteronuclear Feshbach Resonances, New Journal of Physics (Accessed February 21, 2024)
Created March 31, 2005, Updated October 12, 2021