Mostrar registro simples

dc.contributor.authorPâţu, Ovidiu I.pt_BR
dc.contributor.authorKlümper, Andreaspt_BR
dc.contributor.authorFoerster, Angelapt_BR
dc.date.accessioned2018-09-01T02:54:58Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn0031-9007pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/181579pt_BR
dc.description.abstractWe investigate the universal thermodynamics of the two-component one-dimensional Bose gas with contact interactions in the vicinity of the quantum critical point separating the vacuum and the ferromagnetic liquid regime. We find that the quantum critical region belongs to the universality class of the spin-degenerate impenetrable particle gas which, surprisingly, is very different from the singlecomponent case and identify its boundaries with the peaks of the specific heat. In addition, we show that the compressibility Wilson ratio, which quantifies the relative strength of thermal and quantum fluctuations, serves as a good discriminator of the quantum regimes near the quantum critical point. Remarkably, in the Tonks-Girardeau regime, the universal contact develops a pronounced minimum, reflected in a counterintuitive narrowing of the momentum distribution as we increase the temperature. This momentum reconstruction, also present at low and intermediate momenta, signals the transition from the ferromagnetic to the spin-incoherent Luttinger liquid phase and can be detected in current experiments with ultracold atomic gases in optical lattices.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review letters. Melville. Vol. 120, no. 24 (June 2018), 243402, 6 p.pt_BR
dc.rightsOpen Accessen
dc.subjectSistemas de bósonspt_BR
dc.subjectPontos criticospt_BR
dc.titleUniversality and quantum criticality of the one-dimensional spinor Bose gaspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001073872pt_BR
dc.type.originEstrangeiropt_BR


Thumbnail
   

Este item está licenciado na Creative Commons License

Mostrar registro simples