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dc.contributor.authorDusuel, Sébastien
dc.contributor.authorVidal, Julien
dc.contributor.authorArias Carrasco, José Miguel
dc.contributor.authorDukelsky, J.
dc.contributor.authorGarcía Ramos, José Enrique 
dc.date.accessioned2012-03-02T09:07:24Z
dc.date.available2012-03-02T09:07:24Z
dc.date.issued2005-12-30
dc.identifier.citationDusuel, S., Vidal, J., Arias Carrasco, J.M., Dukelsky, J., García Ramos, J. E.: "Continuous unitary transformations in two-level boson systems". Physical Review C. Vol. 72, n. 6 (2005). ISSN 0556-2813
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/10272/5500
dc.description.abstractTwo-level boson systems displaying a quantum phase transition from a spherical (symmetric) to a deformed (broken) phase are studied. A formalism to diagonalize Hamiltonians with O(2L + 1) symmetry for large number of bosons is worked out. Analytical results beyond the simple mean-field treatment are deduced by using the continuous unitary transformations technique. In this scheme, a 1/N expansion for different observables is proposed and allows one to compute the finite-size scaling exponents at the critical point. Analytical and numerical results are compared and reveal the power of the present approach to compute the finite-size corrections in such a context.en
dc.language.isoengen_US
dc.publisherAmerican Physical Society
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectBosonesspa
dc.subject.otherQuantum phase transitionsen
dc.subject.otherInteracting Boson Modelen
dc.titleContinuous unitary transformations in two-level boson systemsen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.relation.publisherversionhttp://dx.doi.org/10.1103/PhysRevC.72.064332
dc.identifier.doi10.1103/PhysRevC.72.064332
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess


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