Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 3: Superconductivity: Properties and Electronic Structure
TT 3.12: Vortrag
Montag, 5. September 2022, 12:30–12:45, H23
Multiloop fRG analysis of the attractive Hubbard model — •Aiman Al-Eryani1, Sarah Heinzelmann1, Anna Kauch2, Alessandro Toschi2, and Sabine Andergassen1 — 1University of Tuebingen — 2TU Wien
We analyse the effect of multiloop corrections in the 2D Attractive Hubbard Model. In a TU-fRG scheme where the conventional multi-loop self-energy flow equations are replaced with a Schwinger-Dyson flow, we demonstrate the importance of self-energy iteration in the convergence to reference Parquet results. Furthermore, we study the feedback of the s-wave pairing fluctuations on the charge density wave order.