On the dangers of partial diagrammatic summations: Benchmarks for the two-dimensional Hubbard model in the weak-coupling regime

We study the two-dimensional Hubbard model in the weak-coupling regime and compare the self-energy obtained from various approximate diagrammatic schemes to the result of diagrammatic Monte Carlo simulations, which sum up all weak-coupling diagrams up to a given order. While dynamical mean-field the...

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Veröffentlicht in:	Physical review. B 2015-06, Vol.91 (23), Article 235114
Hauptverfasser:	Gukelberger, Jan, Huang, Li, Werner, Philipp
Format:	Artikel
Sprache:	eng
Schlagworte:	Approximation Benchmarks Computer simulation Condensed matter Fluctuation Ladder diagrams Mathematical analysis Two dimensional
Online-Zugang:	Volltext
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