A canonically quantized Gutzwiller action gives a Gaussian many-body theory that reproduces non-local correlations in the Bose-Hubbard model with small quantum fluctuations.
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Quantum fluctuations beyond the Gutzwiller approximation in the Bose-Hubbard model
A canonically quantized Gutzwiller action gives a Gaussian many-body theory that reproduces non-local correlations in the Bose-Hubbard model with small quantum fluctuations.