- Letter
Mott-glass phase induced by long-range correlated disorder in a one-dimensional Bose gas
Phys. Rev. A 110, L041304 – Published 25 October, 2024
DOI: https://doi.org/10.1103/PhysRevA.110.L041304
Abstract
We determine the phase diagram of a one-dimensional Bose gas in the presence of disorder with short- and long-range correlations, the latter decaying with distance as . When , the Berezinskii-Kosterlitz-Thouless transition between the superfluid and the localized phase is driven by the long-range correlations and the Luttinger parameter takes the critical value . The localized phase is a Bose glass for , and a Mott glass—characterized by a vanishing compressibility and a gapless conductivity—when . Our conclusions, based on the nonperturbative functional renormalization group and perturbative renormalization group, are confirmed by the study of the case , corresponding to a perfectly correlated disorder in space, where the model is exactly solvable in the semiclassical limit .