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

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

2004-12-15

arxiv.org/abs/cond-mat/0412401v1

Physics

Condensed Matter

Strongly Correlated Electrons

31 pages, 4 figures

Scientific paper

10.1007/s00023-005-0214-z

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.

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