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Theory of single-particle properties of the Hubbard model

Y. M. Vilk·A. -M. S. Tremblay
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Abstract

It is shown that it is possible to quantitatively explain quantum Monte Carlo results for the Green's function of the two-dimensional Hubbard model in the weak to intermediate coupling regime. The analytic approach includes vertex corrections in a paramagnon-like self-energy. All parameters are determined self-consistently. This approach clearly shows that in two dimensions Fermi-liquid quasiparticles disappear in the paramagnetic state when the antiferromagnetic correlation length becomes larger than the electronic thermal de Broglie wavelength.

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Y. M. Vilk, A. -M. S. Tremblay. 1995-02-03. Theory of single-particle properties of the Hubbard model. https://doi.org/10.1209/epl%2Fi1996-00315-2

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