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|
|State||Published - Jul 1 2003|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics