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

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

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

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

Physics

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

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 language	English (US)
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	68
Issue number	1
State	Published - Jul 1 2003

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Cite this

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AB - 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.

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

Abstract

All Science Journal Classification (ASJC) codes

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