Unitarity-limited elastic collision rate in a harmonically trapped Fermi gas

M. E. Gehm, S. L. Hemmer, Kenneth O'Hara, J. E. Thomas

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A formula for the collision rate in a harmonic trap was derived as a function of temperature for an energy-independent cross section σ. It was shown that the numerically calculated collision rates for both the energy-independent and unitary-limited cross sections agree with analytic expressions derived for the high-temperature limit. A hydrodynamic parameter φ=Γ/ω⊥ was defined and calibrated by observing the threshold for hydrodynamic expansion of a strongly interacting Fermi gas as a function of evaporation time.

Original languageEnglish (US)
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
Publication statusPublished - Jul 1 2003


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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