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On the ground state and excitations of a four-component fermion model
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❄️ cond-mat.str-el
keywords
excitationsgroundmodelstatefour-componentapproachbandfermion
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The properties of the ground state and excitations of a four-component Hubbard-like model are studied by the Lieb-Schultz-Mattis approach. It is proven rigorously that the ground state of the model is nondegenerate and excitations are gapless at all band fillings.
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