Collective oscillations in ultracold atomic gases

Details Collective oscillations in ultracold atomic gases Collective oscillations in ultracold atomic gases

2009-12-22

arxiv.org/abs/0912.4420v1

Phys. Rev. A 78, 013408 (2008)

Physics

Condensed Matter

Quantum Gases

8 pages, 3 figures, with minor change in the published version

Scientific paper

10.1103/PhysRevA.78.013408

Using both fluid and kinetic descriptions, where repulsive forces between near by atoms are included, we discuss the basic oscillations and waves of a cloud of ultra-cold atoms confined in a magneto-optical trap. The existence of a hybrid mode, with properties similar to both plasma and acoustic waves is described in detail. Tonks-Dattner resonances for confined hybrid modes in a spherical cloud are discussed and the prediction of a nonlinear coupling between the dipole resonanc and the hybrid modes is considered. Landau damping processes and quasi-linear diffusion in velocity space are also discussed.

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