Emergence of a superglass phase in the random hopping Bose-Hubbard model
Abstract
We study an experimentally feasible system of strongly correlated bosons with random hoppings, described by the infinite-range Bose-Hubbard model on a lattice with hopping integrals given by independent random variables of Gaussian distribution with non-zero mean. We solve this quantum model in the thermodynamic limit, employing the replica method and the Trotter-Suzuki formula. We find and describe a superglass phase that emerges at the interface between glass and superfluid phases. Both glassy and long-range orderings are present in the superglass and compete with each other, as revealed by the anticorrelation of their order parameters. We present phase diagrams in various cross-sections of the multidimensional space of system parameters. In selected parameter subspaces, we compare the results to those of non-disordered, diagonally-disordered, and once celebrated spin-glass systems.
Keywords
Cite
@article{arxiv.2202.05570,
title = {Emergence of a superglass phase in the random hopping Bose-Hubbard model},
author = {Anna M. Piekarska and Tadeusz K. Kopeć},
journal= {arXiv preprint arXiv:2202.05570},
year = {2022}
}
Comments
15 pages, 8 figures