Two-dimensional dipolar bosons with weak disorder
Disordered Systems and Neural Networks
2015-08-25 v1
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.
Cite
@article{arxiv.1505.07758,
title = {Two-dimensional dipolar bosons with weak disorder},
author = {Abdelaali Boudjemaa},
journal= {arXiv preprint arXiv:1505.07758},
year = {2015}
}
Comments
5 pages, 2 figures