Equation of state of a superfluid Fermi gas in the BCS-BEC crossover

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dc.creatorHu, Hui
dc.creatorLiu, Xia-Ji
dc.creatorDrummond, Peter D.
dc.date2005-06-02
dc.date2006-05-12
dc.date.accessioned2026-07-07T06:37:55Z
dc.date.available2026-07-07T06:37:55Z
dc.descriptionWe present a theory for a superfluid Fermi gas near the BCS-BEC crossover, including pairing fluctuation contributions to the free energy similar to that considered by Nozieres and Schmitt-Rink for the normal phase. In the strong coupling limit, our theory is able to recover the Bogoliubov theory of a weakly interacting Bose gas with a molecular scattering length very close to the known exact result. We compare our results with recent Quantum Monte Carlo simulations both for the ground state and at finite temperature. Excellent agreement is found for all interaction strengths where simulation results are available.
dc.description7 pages, 4 figures, published version in Europhysics Letters, a long preprint with details will appear soon
dc.identifierhttps://arxiv.org/abs/cond-mat/0506046
dc.identifierhttp://arxiv.org/abs/cond-mat/0506046
dc.identifierEurophys. Lett. 74, 574 (2006)
dc.identifierdoi:10.1209/epl/i2006-10023-y
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100557
dc.subjectSuperconductivity
dc.subjectStatistical Mechanics
dc.titleEquation of state of a superfluid Fermi gas in the BCS-BEC crossover
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