Single-boson exchange representation of the functional renormalization group for strongly interacting many-electron systems
We present a reformulation of the functional renormalization group (fRG) for many-electron systems, which relies on the recently introduced single-boson exchange (SBE) representation of the parquet equations [F.Krien, A.Valli, and M.Capone, Phys.Rev.B 100, 155149 (2019)10.1103/PhysRevB.100.155149].The latter exploits a diagrammatic decomposition, w