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

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 one-loop approximation we calculate the anisotropic superfluid and condensate densities and give the beyond mean-field stability condition for the binary dipolar Bose gas. A brief variational derivation of the coupled equations that describe macroscopic hydrodynamics of the system in the external non-uniform potential at zero temperature is presented.

6 pages, 2 figures

References in corpus (6)

• Bose-Einstein condensation of chromium
• Bose-Einstein Condensation of Erbium
• Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
• Mean-field expansion in Bose-Einstein condensates with finite-range interactions
• Half-Quantum Vortex Molecules in a Binary Dipolar Bose Gas
• Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime

Cited by in corpus (2)

• Two-dimensional solitons and quantum droplets supported by competing self- and cross-interactions in spin-orbit-coupled condensates
• 2D dilute Bose mixture at low temperatures