Momentum distribution in two-orbital Hubbard model: Quantum Monte Carlo approach

Momentum distribution in two-orbital Hubbard model: Quantum Monte Carlo approach

The two-dimensional two-orbital Hubbard model is studied with the use of worldline quantum Monte Carlo algorithm. Spectral functions and the density of states for various parameters of the model are obtained in both the undoped and low-doped regimes. The invariance of the Fermi surface with respect...

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Veröffentlicht in:Journal of physics. Conference series 2017-12, Vol.941 (1), p.12066
Hauptverfasser: Kashurnikov, Vladimir, Krasavin, Andrey, Zhumagulov, Yaroslav
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Fermi surfaces
Mathematical models
Parameters
Physics
Two dimensional models
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Zusammenfassung:The two-dimensional two-orbital Hubbard model is studied with the use of worldline quantum Monte Carlo algorithm. Spectral functions and the density of states for various parameters of the model are obtained in both the undoped and low-doped regimes. The invariance of the Fermi surface with respect to the strength of the interaction is testified. Fermi-liquid parameters of the model are derived.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/941/1/012066