Speaker
Hannes Braun
(Technische Universität München, Max Planck Institute for Solid State Research)
Description
We develop a functional renormalization group (fRG) framework for two-dimensional Hubbard models whose fermions carry two independent flavor quantum numbers transforming under SU(N) and SU(M), respectively. Exploiting the product-group structure, we show that the two-particle vertex decomposes exactly into two independent scalar functions, reducing the one-loop flow to a closed system of equations for these flavor-singlet amplitudes.
We systematically compare parquet RG and truncated unity fRG calculations for SU(N)xSU(M) Hubbard models.
| Affiliation | TUM/ MPI FKF |
|---|---|
| Career status | PhD student |
Author
Hannes Braun
(Technische Universität München, Max Planck Institute for Solid State Research)
Co-authors
Laura Classen
(Max-Planck-Institut for Solid State Research)
Michael Scherer
(Ruhr University Bochum)