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• W2079941364 abstract "We analyze the ground-state properties of strongly correlated electrons coupled with phonons by means of a generalized Gutzwiller wave function, which includes phononic degrees of freedom. We study in detail the paramagnetic half-filled Hubbard-Holstein model, where the electron-electron interaction can lead to a Mott transition and the electron-phonon coupling to a bipolaronic transition. We critically discuss the quality of the proposed wave function in describing the various transitions and crossovers that occur as a function of the parameters. Previous variational attempts are recovered as particular choices of the wave function, while keeping all the variational freedom allows to access regions of the phase diagram, otherwise inaccessible within previous variational approaches." @default.
• W2079941364 created "2016-06-24" @default.
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• W2079941364 date "2008-06-19" @default.
• W2079941364 modified "2023-09-30" @default.
• W2079941364 title "Gutzwiller scheme for electrons and phonons: The half-filled Hubbard-Holstein model" @default.
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• W2079941364 doi "https://doi.org/10.1103/physrevb.77.235115" @default.
• W2079941364 hasPublicationYear "2008" @default.
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