Phys. Rev. A 72, 041601(R) (2005) [4 pages]Simple mean-field model for condensates in the BEC-BCS crossover regime
We present a mean-field model to describe condensates in the BEC-BCS crossover regime based on pairs of fermionic atoms. By introducing an effective potential, the mean-field equation allows us to calculate the chemical potential, the equation of states, and the atomic correlation function. The results agree surprisingly well with recent many-body calculations. We show that the smooth crossover from the bosonic mean-field repulsion between molecules to the Fermi pressure among atoms is associated with the evolution of the atomic correlation function. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.041601
DOI:
10.1103/PhysRevA.72.041601
PACS:
03.75.Hh, 05.30.Fk, 34.50.−s, 39.25.+k
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