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dc.contributor.authorAstrakharchik, Grigori
dc.contributor.authorKrutitsky, K.V.
dc.contributor.authorNavez, Patrick
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationAstrakharchik, G., Krutitsky, K.V., Navez, P. Phase diagram of quasi-two-dimensional bosons in a laser-speckle potential. "Physical review A", Juny 2013, vol. 87, núm. 6, p. 1-5.
dc.description.abstractWe have studied the phase diagram of a quasi-two-dimensional interacting Bose gas at zero temperature in the presence of random potential created by laser speckles. The superfluid fraction and the fraction of particles with zero momentum are obtained within the mean-field Gross-Pitaevskii theory and in diffusion Monte Carlo simulations. We find a transition from the superfluid to the insulating state when the strength of the disorder grows. Estimations of the critical parameters are compared with the predictions of the percolation theory in the Thomas-Fermi approximation. Analytical expressions for the zero-momentum fraction and the superfluid fraction are derived in the limit of weak disorder and weak interactions within the framework of the Bogoliubov theory. Limits of validity of various approximations are discussed.
dc.format.extent5 p.
dc.subjectÀrees temàtiques de la UPC::Física::Física de partícules
dc.subject.lcshBosons--Mathematical models
dc.subject.otherTwo dimensional
dc.subject.otherMonte Carlo methods
dc.subject.otherPhase diagrams Speckle
dc.titlePhase diagram of quasi-two-dimensional bosons in a laser-speckle potential
dc.subject.lemacBosons -- Models matemàtics
dc.contributor.groupUniversitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorAstrakharchik, G.; Krutitsky, K.V.; Navez, P.
local.citation.publicationNamePhysical review A

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