Collective oscillations of a Fermi gas near a Feshbach resonance

Theja N. De Silva, Erich J. Mueller

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Abstract

A sum rule approach is used to calculate the zero temperature oscillation frequencies of a two component trapped atomic Fermi gas in the Bardeen, Cooper, and Schrieffer-Bose Einstein condensation crossover region. These sum rules are evaluated using a local density approximation which explicitly includes Feshbach molecules. Breathing modes show nonmonotonic behavior as a function of the interaction strength, while quadrupole modes are insensitive to interactions for both spherically symmetric and axially symmetric traps. Quantitative agreement is found with experiments on atomic Li6 systems and with other theoretical approaches.

Original languageEnglish (US)
Article number063614
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume72
Issue number6
DOIs
StatePublished - Dec 2005
Externally publishedYes

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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