Universal superfluid transition and transport properties of two-dimensional dirty bosons

Universal superfluid transition and transport properties of two-dimensional dirty bosons

We study the phase diagram of two-dimensional, interacting bosons in the presence of a correlated disorder in continuous space, by using large-scale quantum Monte Carlo simulations at finite temperature. We show that the superfluid transition is strongly protected against disorder. It remains of the...

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Veröffentlicht in:Physical review letters 2013-08, Vol.111 (5), p.050406-050406, Article 050406
Hauptverfasser: Carleo, Giuseppe, Boéris, Guilhem, Holzmann, Markus, Sanchez-Palencia, Laurent
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Condensed Matter
Physics
Quantum Gases
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container_title Physical review letters
container_volume 111
creator Carleo, Giuseppe
Boéris, Guilhem
Holzmann, Markus
Sanchez-Palencia, Laurent
description We study the phase diagram of two-dimensional, interacting bosons in the presence of a correlated disorder in continuous space, by using large-scale quantum Monte Carlo simulations at finite temperature. 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 a Bose bad-metal phase as a precursor of the Bose-glass phase.
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Physics
Quantum Gases
title Universal superfluid transition and transport properties of two-dimensional dirty bosons
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