Undamped nonequilibrium dynamics of a nondegenerate Bose gas in a 3D isotropic trap

Abstract

We investigate anomalous damping of the monopole mode of a non-degenerate 3D Bose gas under isotropic harmonic confinement as recently reported by the JILA TOP trap experiment [D. S. Lob- ser, A. E. S. Barentine, E. A. Cornell, and H. J. Lewandowski (in preparation)]. Given a realistic confining potential, we develop a model for studying collective modes that includes the effects of anharmonic corrections to a harmonic potential. By studying the influence of these trap anharmonicities throughout a range of temperatures and collisional regimes, we find that the damping is caused by the joint mechanisms of dephasing and collisional relaxation. Furthermore, the model is complimented by Monte Carlo simulations which are in fair agreement with data from the JILA experiment.

11 pages, 6 figures

References in corpus (5)

• Observation of Bose-Einstein Condensation of Molecules
• Spectroscopic insensitivity to cold collisions in a two-state mixture of fermions
• Exact non-equilibrium solutions of the Boltzmann equation under a time-dependent external force
• Persistence of a Non-Equilibrium State: Observation of a Boltzmannian Special Case
• Transition to hydrodynamics in colliding fermion clouds

Cited by in corpus (6)

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• Collapse and revival of the monopole mode of a degenerate Bose gas in an isotropic harmonic trap
• Linear Response of a Periodically Driven Thermal Dipolar Gas
• Numerical scheme for the far-out-of-equilibrium time-dependent Boltzmann collision operator: 1D second-degree momentum discretisation and adaptive time stepping
• Numerical Solver for the out-of-equilibrium time dependent Boltzmann Collision operator: Application to 2D materials