In the strongly interacting 1D t-t'-V model near half-filling, the Luttinger integral deviates from the particle density as zeros in ReG(k,0) appear, signaling a non-Luttinger liquid phase.
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Violation of Luttinger's theorem in one-dimensional interacting fermions
In the strongly interacting 1D t-t'-V model near half-filling, the Luttinger integral deviates from the particle density as zeros in ReG(k,0) appear, signaling a non-Luttinger liquid phase.