Journal of Statistical Physics

, Volume 115, Issue 1–2, pp 57–89 | Cite as

Ultracold Atomic Fermi–Bose Mixtures in Bichromatic Optical Dipole Traps: A Novel Route to Study Fermion Superfluidity

  • Roberto Onofrio
  • Carlo Presilla


The study of low density, ultracold atomic Fermi gases is a promising avenue to understand fermion superfluidity from first principles. One technique currently used to bring Fermi gases in the degenerate regime is sympathetic cooling through a reservoir made of an ultracold Bose gas. We discuss a proposal for trapping and cooling of two-species Fermi–Bose mixtures into optical dipole traps made from combinations of laser beams having two different wavelengths. In these bichromatic traps it is possible, by a proper choice of the relative laser powers, to selectively trap the two species in such a way that fermions experience a stronger confinement than bosons. As a consequence, a deep Fermi degeneracy can be reached having at the same time a softer degenerate regime for the Bose gas. This leads to an increase in the sympathetic cooling efficiency and allows for higher precision thermometry of the Fermi–Bose mixture.

Bose and Fermi degenerate gases superfluidity and superconductivity evaporative cooling sympathetic cooling nonequilibrium statistical mechanics Bose-Fermi mixtures 


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Copyright information

© Plenum Publishing Corporation 2004

Authors and Affiliations

  • Roberto Onofrio
    • 1
    • 2
    • 3
  • Carlo Presilla
    • 1
    • 2
    • 4
  1. 1.Dipartimento di Fisica “G. Galilei,”Università di PadovaPadovaItaly
  2. 2.Unità di Roma 1 and Center for Statistical Mechanics and ComplexityIstituto Nazionale per la Fisica della MateriaRomaItaly
  3. 3.Los Alamos National LaboratoryLos Alamos
  4. 4.Istituto Nazionale di Fisica NucleareRomaItaly

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