most citedQuadratic operators used in deducing exact ground states for correlated systems: ferromagnetism at half filling provided by a dispersive band

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cond-mat.str-el2007★ 2 cited

Quadratic operators used in deducing exact ground states for correlated systems: ferromagnetism at half filling provided by a dispersive band

Istvan Chalupa, Zsolt Gulacsi

Quadratic operators are used in transforming the model Hamiltonian (H) of one correlated and dispersive band in an unique positive semidefinite form coopting both the kinetic and i…