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dc.contributor.authorMorera Navarro, Iván
dc.contributor.authorAstrakharchik, Grigori
dc.contributor.authorPolls Martí, Artur
dc.contributor.authorJulia Diaz, Bruno
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationMorera, I. [et al.]. Universal dimerized quantum droplets in a one-dimensional lattice. "Physical review letters", 11 Gener 2021, vol. 126, núm. 2, p. 023001:1-023001:6.
dc.description.abstractThe ground-state properties of two-component bosonic mixtures in a one-dimensional optical lattice are studied both from few- and many-body perspectives. We rely directly on a microscopic Hamiltonian with attractive intercomponent and repulsive intracomponent interactions to demonstrate the formation of a quantum liquid. We reveal that its formation and stability can be interpreted in terms of finite-range interactions between dimers. We derive an effective model of composite bosons (dimers) which correctly captures both the few- and many-body properties and validate it against exact results obtained by the density matrix renormalization group method for the full Hamiltonian. The threshold for the formation of the liquid coincides with the appearance of a bound state in the dimer-dimer problem and possesses a universality in terms of the two-body parameters of the dimer-dimer interaction, namely, scattering length and effective range. For sufficiently strong effective dimer-dimer repulsion we observe fermionization of the dimers which form an effective Tonks-Girardeau state and identify conditions for the formation of a solitonic solution. Our predictions are relevant to experiments with dipolar atoms and two-component mixtures.
dc.publisherAmerican Institute of Physics (AIP)
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshScattering (Physics)
dc.subject.lcshPhase transformations (Statistical physics)
dc.subject.otherScattering theory
dc.subject.otherMixtures of atomic and/or molecular quantum gases
dc.subject.otherLiquid-gas phase transition
dc.subject.otherCold gases in optical lattices
dc.titleUniversal dimerized quantum droplets in a one-dimensional lattice
dc.subject.lemacDispersió (Física)
dc.subject.lemacTransicions de fase (Física estadística)
dc.contributor.groupUniversitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorMorera, I.; Astrakharchik, G.; Polls, A.; Julia, B.
local.citation.publicationNamePhysical review letters

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