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Signatures of macroscopic quantum coherence in ultracold dilute Fermi gases

Authors
  • Onofrio, Roberto
  • Presilla, Carlo
Type
Published Article
Publication Date
Nov 15, 2004
Submission Date
Nov 15, 2004
Identifiers
DOI: 10.1103/PhysRevA.70.043608
arXiv ID: cond-mat/0411388
Source
arXiv
License
Unknown
External links

Abstract

We propose a double-well configuration for optical trapping of ultracold two-species Fermi-Bose atomic mixtures. Two signatures of macroscopic quantum coherence attributable to a superfluid phase transition for the Fermi gas are analyzed. The first signature is based upon tunneling of Fermi pairs when the power of the deconfining laser beam is significantly reduced. The second relies on the observation of interference fringes in a regime where the fermions are trapped in two sharply separated minima of the potential. Both signatures rely on small decoherence times for the Fermi samples, which should be possible by reaching low temperatures using a Bose gas as a refrigerator, and a bichromatic optical dipole trap for confinement, with optimal heat-capacity matching between the two species.

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