Collisional relaxation in diffuse clouds of trapped bosons

Abstract

The damping of collective modes and the relaxation of temperature anisotropies in a trapped Bose gas is determined at temperatures above the Bose-Einstein condensation temperature in the collisionless regime. We demonstrate for both cases how the effects of collisions may be treated perturbatively and calculate relaxation rates based on a variational principle. Our results are compared with experiment and with previous theoretical calculations.

13 pages, revtex, 4 postscript figures

References in corpus (4)

• Collective oscillations of a classical gas confined in harmonic traps
• Hydrodynamic modes in a trapped Bose gas above the Bose-Einstein transition
• Damping of Hydrodynamic Modes in a Trapped Bose Gas above the Bose-Einstein Transition Temperature
• Relaxation Processes in Clouds of Trapped Bosons above the Bose-Einstein Condensation Temperature

Cited by in corpus (19)

• The critical temperature of a trapped, weakly interacting Bose gas
• Viscous relaxation and collective oscillations in a trapped Fermi gas near the unitarity limit
• Dynamics of a classical gas including dissipative and mean field effects
• Exact non-equilibrium solutions of the Boltzmann equation under a time-dependent external force
• Sympathetic cooling and collisional properties of a Rb-Cs mixture
• Determination of the s-wave Scattering Length of Chromium
• Frequency and damping of the Scissors Mode of a Fermi gas
• Multi-channel scattering and Feshbach resonances: Effective theory, phenomenology, and many-body effects
• Laser cooling and trapping of atomic strontium for ultracold atom physics, high-precision spectroscopy and quantum sensors
• Damping of condensate collective modes due to equilibration with the non-condensate
• Kinetic Theory of Collective Excitations and Damping in Bose-Einstein Condensed Gases
• Getting the elastic scattering length by observing inelastic collisions in ultracold metastable helium atoms
• Thermalization in mixtures of ultracold gases
• Collisional Properties of Cold Spin-Polarized Metastable Neon Atoms
• Continuous loading of ${}^1$S${}_0$ calcium atoms into an optical dipole trap
• Cross-Dimensional relaxation in Bose-Fermi mixtures
• Finite temperature theory of the scissors mode in a Bose gas using the moment method
• Elliptic flow in a strongly-interacting normal Bose gas
• Condensate Oscillations, Kinetic Equations and Two-Fluid Hydrodynamics in a Bose Gas