Disorder-induced superfluidity

Abstract

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.

5 pages, 6 figures

References in corpus (6)

• Anderson localization of a non-interacting Bose-Einstein condensate
• Direct observation of Anderson localization of matter-waves in a controlled disorder
• Strongly interacting bosons in a disordered optical lattice
• Disorder-induced trapping versus Anderson localization in Bose-Einstein condensates expanding in disordered potentials
• Theory of the superglass phase
• Disorder and the elusive superfluid phase of para-hydrogen

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• Effects of disorder on quantum fluctuations and superfluid density of a Bose-Einstein condensate in a two-dimensional optical lattice
• Absence of superfluidity in a quasi one-dimensional parahydrogen fluid adsorbed inside carbon nanotubes
• Percolation Enhanced Supersolids in the Extended Bose-Hubbard Model
• Equilibrium and Disorder-induced behavior in Quantum Light-Matter Systems
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• Phases of lattice hard core bosons in a periodic superlattice
• Disordered Supersolids in the Extended Bose-Hubbard Model
• Systematics of small parahydrogen clusters in two dimensions
• Phase diagram of hard core bosons with anisotropic interactions
• Random-field-induced order in bosonic t-J model
• Study of Kosterlitz-Thouless transition of Bose systems governed by a random potential using quantum Monte Carlo simulations
• Bound state of a He-3 atom at the interface of crystal and superfluid He-4