The Hubbard model at half-filling, part III: the lower bound on the self-energy

Abstract

We complete the proof that the two-dimensional Hubbard model at half-filling is not a Fermi liquid in the mathematically precise sense of Salmhofer, by establishing a lower bound on a second derivative in momentum of the first non-trivial self-energy graph.

arXiv comment31 pages, 4 figures

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