Sharp crossover from composite fermionization to phase separation in microscopic mixtures of ultracold bosons

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dc.contributor.authorGarcia-March, Miguel A.
dc.contributor.authorJulia-Diaz, B.
dc.contributor.authorAstrakharchik, G. E.
dc.contributor.authorBusch, Thomas
dc.contributor.authorBoronat, J.
dc.contributor.authorPolls, A.
dc.contributor.funderScience Foundation Ireland
dc.contributor.funderDirección General de Investigación Científica y Técnica
dc.contributor.funderGeneralitat de Catalunya
dc.contributor.funderMinisterio de Educación, Cultura y Deporte
dc.date.accessioned2017-08-22T08:56:58Z
dc.date.available2017-08-22T08:56:58Z
dc.date.issued2013
dc.description.abstractWe show that a two-component mixture of a few repulsively interacting ultracold atoms in a one-dimensional trap possesses very diverse quantum regimes and that the crossover between them can be induced by tuning the interactions in one of the species. Starting from the composite fermionization regime, in which the interactions between both components are large and neither gas is phase coherent, our results show that a phase-separated state can be reached by increasing the interaction in one of the species. In this regime, the weakly interacting component stays at the center of the trap and becomes almost fully phase coherent, while the strongly interacting one is expelled to the edges of the trap. The crossover is sharp, as can be witnessed in the system's energy and in the occupation of the lowest natural orbital of the weakly interacting species. We show that such a transition is a few-atom effect which disappears for a large population imbalance.en
dc.description.sponsorshipScience Foundation Ireland (10/IN.1/I2979); Dirección General de Investigación Científica y Técnica (FIS2011-25275, FIS2008-00784); Generalitat de Catalunya (2009SGR-1003, 2009SGR-01289)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid63604
dc.identifier.citationGarcia-March, M. A., Juliá-Díaz, B., Astrakharchik, G. E., Busch, T., Boronat, J. and Polls, A. (2013) 'Sharp crossover from composite fermionization to phase separation in microscopic mixtures of ultracold bosons', Physical Review A, 88(6), 063604. (5pp). doi: 10.1103/PhysRevA.88.063604en
dc.identifier.doi10.1103/PhysRevA.88.063604
dc.identifier.issn1050-2947
dc.identifier.issn1094-1622
dc.identifier.issued6
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4486
dc.identifier.volume88
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.88.063604
dc.rights© 2013, American Physical Societyen
dc.subjectBose-einstein condensateen
dc.subjectTonks-girardeau gasen
dc.subjectStatesen
dc.subjectAtomsen
dc.titleSharp crossover from composite fermionization to phase separation in microscopic mixtures of ultracold bosonsen
dc.typeArticle (peer-reviewed)en
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