Landau damping in a dipolar Bose-Fermi mixture in the Bose-Einstein condensation (BEC) limit

doi:10.1088/1674-1056/25/12/126701

Abstract

By using a mean-field approximation which describes the coupled oscillations of condensate and noncondensate atoms in the collisionless regime, Landau damping in a dilute dipolar Bose-Fermi mixture in the BEC limit where Fermi superfluid is treated as tightly bounded molecules, is investigated. In the case of a uniform quasi-two-dimensional (2D) case, the results for the Landau damping due to the Bose-Fermi interaction are obtained at low and high temperatures. It is shown that at low temperatures, the Landau damping rate is exponentially suppressed. By increasing the strength of dipolar interaction, and the energy of boson quasiparticles, Landau damping is suppressed over a broader temperature range.

Keywords: Landau damping mixtures of Bose and Fermi superfluids dipole-dipole interaction

Received: 19 June 2016
Revised: 25 July 2016
Accepted manuscript online:

PACS:	67.85.-d	(Ultracold gases, trapped gases)
	67.60.Fp	(Bose-Fermi mixtures)
	03.75.Kk	(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)

Corresponding Authors: H Yavari
E-mail: h.yavary@sci.ui.ac.ir

Cite this article:

S M Moniri, H Yavari, E Darsheshdar Landau damping in a dipolar Bose-Fermi mixture in the Bose-Einstein condensation (BEC) limit 2016 Chin. Phys. B 25 126701

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Landau damping in a dipolar Bose-Fermi mixture in the Bose-Einstein condensation (BEC) limit

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