We use quantum Monte Carlo simulations to study the phase diagram of hard-core bosons with short-ranged {\it attractive} interactions, in the presence of uniform diagonal disorder. It is shown that moderate disorder stabilizes a glassy superfluid phase in a range of values of the attractive interaction for which the system is a Mott insulator, in the absence of disorder. A transition to an insulating Bose glass phase occurs as the strength of the disorder or interactions increases.
@article{arxiv.0812.3417,
title = {Disorder-induced superfluidity},
author = {Long Dang and Massimo Boninsegni and Lode Pollet},
journal= {arXiv preprint arXiv:0812.3417},
year = {2013}
}