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Exact ground state of strongly correlated electron systems from symmetry-restored wave-functions

Abstract : The four site Hubbard model is considered from the exact diagonalization and variational method points of view. We show that a symmetry projected mean-field theory recovers the exact ground state energy, irrespective of the interaction strength, in contrast to the conventional Gutzwiller wave-function that will be also considered.
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http://hal.in2p3.fr/in2p3-01073840
Contributor : Sandrine Guesnon <>
Submitted on : Friday, October 10, 2014 - 3:12:32 PM
Last modification on : Tuesday, February 5, 2019 - 12:12:09 PM

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  • HAL Id : in2p3-01073840, version 1

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A. Leprévost. Exact ground state of strongly correlated electron systems from symmetry-restored wave-functions. Computational Challenges in Nuclear and Many-­Body Physics, Sep 2014, Stockholm, Sweden. ⟨in2p3-01073840⟩

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