Universal Superfluid Transition and Transport Properties of Two-Dimensional Dirty Bosons
Quantum Gases
2013-08-29 v3
Abstract
We study the phase diagram of two-dimensional, interacting bosons in the presence of a correlated disorder in continuous space, using large-scale finite temperature quantum Monte Carlo simulations. We show that the superfluid transition is strongly protected against disorder. It remains of the Berezinskii-Kosterlitz-Thouless type up to disorder strengths comparable to the chemical potential. Moreover, we study the transport properties in the strong disorder regime where a zero-temperature Bose-glass phase is expected. We show that the conductance exhibits a thermally activated behavior vanishing only at zero temperature. Our results point towards the existence of Bose bad-metal phase as a precursor of the Bose-glass phase.
Keywords
Cite
@article{arxiv.1305.3032,
title = {Universal Superfluid Transition and Transport Properties of Two-Dimensional Dirty Bosons},
author = {Giuseppe Carleo and Guilhem Boéris and Markus Holzmann and Laurent Sanchez-Palencia},
journal= {arXiv preprint arXiv:1305.3032},
year = {2013}
}