title: Variational description of Mott insulators.
abstract: The Gutzwiller wave function for a strongly correlated model can, if supplemented with a long-range Jastrow factor, provide a proper variational description of Mott insulators, so far unavailable. We demonstrate this concept in the prototypical one-dimensional t-t(') Hubbard model, where at half-filling we reproduce all known phases, namely, the ordinary Mott undimerized insulator with power-law spin correlations at small t(')/t, the spin-gapped metal above a critical t(')/t and small U, and the dimerized Mott insulator at large repulsion.
authors.affiliation: International School for Advanced Studies (SISSA), Via Beirut 2-4, I-34014 Trieste, Italy.
authors.forename: Manuela
authors.initials: M
authors.lastname: Capello
authors.forename: Federico
authors.initials: F
authors.lastname: Becca
authors.forename: Michele
authors.initials: M
authors.lastname: Fabrizio
authors.forename: Sandro
authors.initials: S
authors.lastname: Sorella
authors.forename: Erio
authors.initials: E
authors.lastname: Tosatti