Finite temperature disordered bosons in two dimensions
Disordered Systems and Neural Networks
2018-07-26 v3 Quantum Gases
Abstract
We study phase transitions in a two dimensional weakly interacting Bose gas in a random potential at finite temperatures. We identify superfluid, normal fluid, and insulator phases and construct the phase diagram. At T=0 one has a tricritical point where the three phases coexist. The truncation of the energy distribution at the trap barrier, which is a generic phenomenon in cold atom systems, limits the growth of the localization length and in contrast to the thermodynamic limit the insulator phase is present at any temperature.
Cite
@article{arxiv.1708.03628,
title = {Finite temperature disordered bosons in two dimensions},
author = {G. Bertoli and V. P. Michal and B. L. Altshuler and G. V. Shlyapnikov},
journal= {arXiv preprint arXiv:1708.03628},
year = {2018}
}
Comments
Article (5 pages, 1 figure) and Supplemental Material (6 pages, 9 figures). v2: updated abstract, references, typos, plus small changes in text and supplemental material. v3: published version