We develop a consistent formalism in order to explore the effects of density and spin fluctuations on the quasi-particle properties and, as a consequence, on the pairing critical temperature of a trapped Fermi gas on the attractive side of a Feshbach resonance. We first analyse the quasi-particle properties of a gas due to interactions far from resonance (effective mass and lifetime, quasi-particle strength and effective interaction) for the two cases of a spherically symmetric harmonic trap and of a spherically symmetric infinite potential well. We then explore the effect of each of these quantities on Tc and point out the important role played by the discrete level structure.
Quasi-particle properties of trapped Fermi gases / L. Giorgetti, L. Viverit, G. Gori, F. Barranco, E. Vigezzi, R. A. Broglia. - In: JOURNAL OF PHYSICS. B, ATOMIC MOLECULAR AND OPTICAL PHYSICS. - ISSN 0953-4075. - 38:7(2005), pp. 949-973.
Quasi-particle properties of trapped Fermi gases
L. Giorgetti;L. Viverit;G. Gori;R. A. Broglia
2005
Abstract
We develop a consistent formalism in order to explore the effects of density and spin fluctuations on the quasi-particle properties and, as a consequence, on the pairing critical temperature of a trapped Fermi gas on the attractive side of a Feshbach resonance. We first analyse the quasi-particle properties of a gas due to interactions far from resonance (effective mass and lifetime, quasi-particle strength and effective interaction) for the two cases of a spherically symmetric harmonic trap and of a spherically symmetric infinite potential well. We then explore the effect of each of these quantities on Tc and point out the important role played by the discrete level structure.Pubblicazioni consigliate
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