Two-dimensional dipolar bosons with weak disorder

Abstract

We consider two-dimensional dipolar bosonic gas with dipoles oriented perpendicularly to the plane in a weak random potential. We investigate analytically and numerically the condensate depletion, the one-body density-matrix, the ground state energy, the sound velocity and the superfluid fraction. Concentrating on the regime where a rotonlike excitation spectrum forms, our results show that the superfluidity disappears below a critical value of disorder strength yielding the transition to a non-trivial quantum regime.

5 pages, 2 figures

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• Bose-Bose mixtures in a weak-disorder potential: Fluctuations and superfluidity
• Effects of the Lee-Huang-Yang quantum corrections on a disordered dipolar Bose gas
• Moving binary Bose-Einstein condensates in a weak random potential
• Dipolar Bose gas with three-body interactions in weak disorder
• Effects of weak disorder on two-dimensional bilayered dipolar Bose-Einstein condensates
• Quench dynamics of disordered quadrupolar Bose-Einstein condensates
• Superfluidity and coherence in uniform dipolar binary Bose mixtures