Beyond mean-field properties of binary dipolar Bose mixtures at low temperatures

Volodymyr Pastukhov
Phys. Rev. A 95, 023614 – Published 14 February 2017

Abstract

We rigorously analyze the low-temperature properties of homogeneous three-dimensional two-component Bose mixture with dipole-dipole interaction. For such a system the effective hydrodynamic action that governs the behavior of low-energy excitations is derived. The infrared structure of the exact single-particle Green's functions is obtained in terms of macroscopic parameters, namely the inverse compressibility and the superfluid density matrices. Within the one-loop approximation we calculate some of the most relevant observable quantities and give the beyond mean-field stability condition for the binary dipolar Bose gas in the dilute limit. A brief variational derivation of the coupled equations that describe macroscopic hydrodynamics of the system in the external nonuniform potential at zero temperature is presented.

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  • Received 18 October 2016

DOI:https://doi.org/10.1103/PhysRevA.95.023614

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Volodymyr Pastukhov*

  • Department for Theoretical Physics, Ivan Franko National University of Lviv, 12 Drahomanov Street, Lviv-5, 79005 Ukraine

  • *volodyapastukhov@gmail.com

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Issue

Vol. 95, Iss. 2 — February 2017

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