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;VIVERIT, LUCIANO;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.
Settore FIS/03 - Fisica della Materia
JOURNAL OF PHYSICS. B, ATOMIC MOLECULAR AND OPTICAL PHYSICS
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/144587
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