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

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

中国物理B ›› 2016, Vol. 25 ›› Issue (12): 126701-126701.doi: 10.1088/1674-1056/25/12/126701

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

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

S M Moniri, H Yavari, E Darsheshdar

Department of Physics, University of Isfahan, Isfahan 81746, Iran

收稿日期:2016-06-19 修回日期:2016-07-25 出版日期:2016-12-05 发布日期:2016-12-05
通讯作者: H Yavari E-mail:h.yavary@sci.ui.ac.ir

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

S M Moniri, H Yavari, E Darsheshdar

Department of Physics, University of Isfahan, Isfahan 81746, Iran

Received:2016-06-19 Revised:2016-07-25 Online:2016-12-05 Published:2016-12-05
Contact: H Yavari E-mail:h.yavary@sci.ui.ac.ir

摘要/Abstract

摘要：

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.

关键词: Landau damping, mixtures of Bose and Fermi superfluids, dipole-dipole interaction

Abstract:

Key words: Landau damping, mixtures of Bose and Fermi superfluids, dipole-dipole interaction

中图分类号: (Ultracold gases, trapped gases)

67.85.-d

67.60.Fp (Bose-Fermi mixtures) 03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)

S M Moniri, H Yavari, E Darsheshdar. Landau damping in a dipolar Bose-Fermi mixture in the Bose-Einstein condensation (BEC) limit[J]. 中国物理B, 2016, 25(12): 126701-126701.

S M Moniri, H Yavari, E Darsheshdar. Landau damping in a dipolar Bose-Fermi mixture in the Bose-Einstein condensation (BEC) limit[J]. Chin. Phys. B, 2016, 25(12): 126701-126701.

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

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

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