Abstract
The model which we have recently proposed to describe the behavior of a
dilute Fermi gas in the presence of a Fechbach resonance (M. Holland,
S.J.J.M.F. Kokkelmans, M.L. Chiofalo, and R. Walser, Phys. Rev. Lett.
87), 120406 (2001). (S.J.J.M.F. Kokkelmans, J.N. Milstein, M.L.
Chiofalo, R. Walser, and M.J. Holland, e-print cond-mat/0112283.) has
been extended to take into account the first order effects of pairing
fluctuations. Within the context of a path integral formalism, we
discuss a model which describes the crossover between the strong and
weak coupling regimes of a dilute Fermi gas in the presence of a
Feschbach resonance. With this model we are able to connect between the
weak coupling BCS-regime and the strongly coupled BEC limits by
modifying the detuning of the resonant state. Even though the scattering
length goes through a singularity in the intermediate coupling regime,
the curves connecting these regimes remains smooth.
| Original language | English |
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| Publication status | Published - 1 May 2002 |
| Event | 33rd Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2002 - Williamsburg, United States Duration: 29 Jun 2002 → 1 Jul 2002 Conference number: 33 |
Conference
| Conference | 33rd Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2002 |
|---|---|
| Abbreviated title | DAMOP 2002 |
| Country/Territory | United States |
| City | Williamsburg |
| Period | 29/06/02 → 1/07/02 |