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TT: Fachverband Tiefe Temperaturen

TT 3: Superconductivity: Properties and Electronic Structure

TT 3.12: Talk

Monday, September 5, 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.