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Biorthogonal projected energies of a Gutzwiller similarity transformed Hamiltonian
J M Wahlen-Strothman1, G E Scuseria1,2,3
1Department of Physics and Astronomy, Rice University, Houston, TX 77005, USA.
Abstract:
We present a method incorporating biorthogonal orbital-optimization, symmetry projection, and double-occupancy screening with a non-unitary similarity transformation generated by the Gutzwiller factor [Formula: see text], and apply it to the Hubbard model. Energies are calculated with mean-field computational scaling with high-quality results comparable to coupled cluster singles and doubles. This builds on previous work performing similarity transformations with more general, two-body Jastrow-style correlators. The theory is tested on 2D lattices ranging from small systems into the thermodynamic limit and is compared to available reference data.
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