Effect of long-range 1/r interactions on the Landau damping in a Bose-Fermi mixture

Moniri, Seyed Mostafa; Yavari, H.; Darsheshdar, Elnaz

doi:10.1140/epjp/i2016-16122-7

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…Effects of DDI, impurity-boson interaction and external trapping potentials on the breathing modes of impurity have been analyzed using a variational scheme [42]. Furthermore, depletion due to the impurities of dipolar Bose polarons has been examined using an effective action in mean-field approximation and found to be independent of the condensed density [43].…”

Section: Introductionmentioning

confidence: 99%

Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

Guebli

Boudjemâa

2019

J. Phys. B: At. Mol. Opt. Phys.

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We study the dynamics of dipolar Bose polarons in the presence of the normal and anomalous fluctuations using the time-dependent Hartree-Fock-Bogoliubov theory. The density profiles of the condensate, the anomalous component and the impurity are deeply analyzed. The time evolution of the width and the center-of-mass oscillation of such quantities is also highlighted. We calculate corrections due to quantum fluctuations and impurity to the chemical potential and the radius of the condensate and of the anomalous component in the weak coupling regime using the Thomas-Fermi approximation. Effects of the dipole-dipole interaction, impurity-host interaction and the anomalous fluctuation on the width and on the breathing frequencies of the impurity are discussed by variational and numerical means.

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Section: Introductionmentioning

confidence: 99%

Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

Guebli

Boudjemâa

2019

J. Phys. B: At. Mol. Opt. Phys.

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“…The effect of long-range 1/r interaction on the Landau damping in a Bose-Fermi superfluid mixture has also been studied. [26] To the best of our knowledge, the effect of dipole-dipole interaction between particles on the Landau damping of a Bose-Fermi superfluid mixture has not been studied. In this paper, we study the Landau damping in a mixture of dipolar Bose-Fermi superfluid gas.…”

Section: Introductionmentioning

confidence: 99%

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

Moniri¹,

Yavari²,

Darsheshdar³

2016

Chinese Phys. B

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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.

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Effect of long-range 1/r interaction on thermal and quantum depletion of a dipolar quasi-two-dimensional Bose gas

Tamaddonpur

Yavari

Saeidi

2019

Low Temperature Physics

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The depletion of a quasi-two-dimensional (quasi-2D) dipolar Bose condensed gas in the presence of both contact and long-range 1/r interactions is investigated in the framework of Hartree–Fock–Bogoliubov (HFB) approximation. When the characteristic wavelength of a mode is much larger than the trap size, the dipole-dipole (DD) interaction can be treated as a contact interaction and in the low momentum limit the long-range nature of the 1/r interaction has the dominant contribution and leads to the nonlinear (nonphononic) dispersion relation. We will show that quantum depletion is temperature independent and is determined by the contact, DD and longrange 1/r coupling constants (ɛdd = gd/g and C). The the quantum depletion is affected by long-range 1/r interaction and at large momentum limits the momentum dependence of quantum depletion unaffected by 1/r interaction.

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Effect of long-range 1/r interactions on the Landau damping in a Bose-Fermi mixture

Cited by 5 publications

References 41 publications

Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

Effects of quantum fluctuations on the dynamics of dipolar Bose polarons

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

Effect of long-range 1/r interaction on thermal and quantum depletion of a dipolar quasi-two-dimensional Bose gas

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