Quantum Phase Transition in the Infinite Dimensional Hubbard Model

Yasuo Y. Suzuki*, Shin Ichi Saito, Susumu Kurihara

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    We investigated the ground state of the infinite dimensional Hubbard model for both attractive and repulsive interactions by applying Gutzwiller type variational wave functions. Our variational wave functions have lower energies than the simple BCS wave function for the attractive case, and lower energies than the Brinkman-Rice state for the repulsive case. We found that the system has several phases depending on the density of electrons and the interaction strength. Investigated phases include antiferromagnetic, Fermi liquid, superconducting, charge density wave, and supersolid phases. The last one is a coexistence phase of superconducting and charge density wave states.

    Original languageEnglish
    Pages (from-to)897-902
    Number of pages6
    JournalJournal of Low Temperature Physics
    Issue number5-6
    Publication statusPublished - 1998

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)


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