BCS-BEC Crossover in a Gas of Fermi Atoms with a Feshbach Resonance
Top Cited Papers
- 5 September 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 89 (13), 130402
- https://doi.org/10.1103/physrevlett.89.130402
Abstract
We discuss the BCS-BEC crossover in a degenerate Fermi gas of two hyperfine states interacting close to a Feshbach resonance. We show that, by including fluctuation contributions to the free energy similar to that considered by Nozières and Schmitt-Rink, the character of the superfluid phase transition continuously changes from the BCS-type to the BEC-type, as the threshold of the quasimolecular band is lowered. In the BEC regime, the superfluid phase transition is interpreted in terms of molecules associated with both the Feshbach resonance and Cooper pairing.Keywords
All Related Versions
This publication has 12 references indexed in Scilit:
- Signatures of Resonance Superfluidity in a Quantum Fermi GasPhysical Review Letters, 2002
- Resonance Superfluidity in a Quantum Degenerate Fermi GasPhysical Review Letters, 2001
- Quasipure Bose-Einstein Condensate Immersed in a Fermi SeaPhysical Review Letters, 2001
- Prospect of creating a composite Fermi–Bose superfluidPhysics Letters A, 2001
- Observation of Fermi Pressure in a Gas of Trapped AtomsScience, 2001
- Onset of Fermi Degeneracy in a Trapped Atomic GasScience, 1999
- Feshbach resonances in atomic Bose–Einstein condensatesPhysics Reports, 1999
- Spectral properties of the boson-fermion model in the superconducting statePhysical Review B, 1996
- Gap energy and long-range order in the boson-fermion model of superconductivityPhysical Review B, 1989
- Bose condensation in an attractive fermion gas: From weak to strong coupling superconductivityJournal of Low Temperature Physics, 1985