Quasi-particle functional Renormalisation Group calculations in the two-dimensional half-filled Hubbard model at finite temperatures

Rohe, Daniel; Honerkamp, Carsten

doi:10.21468/SciPostPhys.9.6.084

SciPost Physics

Quasi-particle functional Renormalisation Group calculations in the two-dimensional half-filled Hubbard model at finite temperatures

Daniel Rohe, Carsten Honerkamp

SciPost Phys. 9, 084 (2020) · published 7 December 2020

doi: 10.21468/SciPostPhys.9.6.084
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Abstract

We present a highly parallelisable scheme for treating functional Renormalisation Group equations which incorporates a quasi-particle-based feedback on the flow and provides direct access to real-frequency self-energy data. This allows to map out the boundaries of Fermi-liquid regimes and to study the effect of quasi-particle degradation near Fermi liquid instabilities. As a first application, selected results for the two-dimensional half-filled perfectly nested Hubbard model are shown.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.9.6.084
TI  - Quasi-particle functional Renormalisation Group calculations in the two-dimensional half-filled Hubbard model at finite temperatures
PY  - 2020/12/07
UR  - https://scipost.org/SciPostPhys.9.6.084
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 9
IS  - 6
SP  - 084
A1  - Rohe, Daniel
AU  - Honerkamp, Carsten
AB  - We present a highly parallelisable scheme for treating functional Renormalisation Group equations which incorporates a quasi-particle-based feedback on the flow and provides direct access to real-frequency self-energy data. This allows to map out the boundaries of Fermi-liquid regimes and to study the effect of quasi-particle degradation near Fermi liquid instabilities. As a first application, selected results for the two-dimensional half-filled perfectly nested Hubbard model are shown.
ER  -

@Article{10.21468/SciPostPhys.9.6.084,
	title={{Quasi-particle functional Renormalisation Group calculations in the two-dimensional half-filled Hubbard model at finite temperatures}},
	author={Daniel Rohe and Carsten Honerkamp},
	journal={SciPost Phys.},
	volume={9},
	pages={084},
	year={2020},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.9.6.084},
	url={https://scipost.org/10.21468/SciPostPhys.9.6.084},
}

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¹ Daniel Rohe,
² Carsten Honerkamp