Single particle properties of the 2D Hubbard model for real frequencies at weak coupling: Breakdown of the Dyson series for partial self-energy expansions

We generate the perturbative expansion of the single-particle Green's function and related self-energy for a half-filled single-band Hubbard model on a square lattice. We invoke algorithmic Matsubara integration to evaluate single-particle quantities for real and Matsubara frequencies and verif...

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Veröffentlicht in:	arXiv.org 2021-07
Hauptverfasser:	McNiven, Bradley D E, Andrews, G Todd, LeBlanc, James P F
Format:	Artikel
Sprache:	eng
Schlagworte:	Clean energy Coupling Green's functions Perturbation Phase diagrams Two dimensional models
Online-Zugang:	Volltext
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