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From known phase diagram regions of different model Hamiltonians describing strongly correlated systems we deduced new domains of the ground state phase diagram of the same models by a unitary transformation. Different types of extended Hubbard Hamiltonians were used for the starting point and the existence of new stable spin-density waves, charge-density waves, ferromagnetic states and a paramagnetic insulator is demonstrated. The procedure used is dimension independent. The ground state phase diagrams of several strongly correlated systems modelled by extended Hubbard-like Hamiltonians are analysed using unitary transformations. New stable spin-density wave, chargedensity wave, ferromagnetic or paramagnetic insulator phases are obtained in different cases. The results are true in any dimensions. [ABSTRACT FROM AUTHOR]

Presents results related to the T=0 phase diagram of the periodic Anderson model in the strong coupling dimensions. Deduction of ground state with algebraic structure; Characterization on the restricted parameter region; Unsatisfaction standard fermionic anticommutation relations.