Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 61: Correlated Electrons: (General) Theory 1

TT 61.8: Vortrag

Donnerstag, 10. März 2016, 11:30–11:45, H18

Towards an efficient algorithmic combination of functional renormalization group and dynamical mean field theory — •Demetrio Vilardi¹, Nils Wentzell^2,3, Agnese Tagliavini^2,3, Ciro Taranto^1,3, Alessandro Toschi², Sabine Andergassen³, and Walter Metzner¹ — ¹Max Planck Institute for Solid State Research, Stuttgart, Germany — ²Vienna University of Technology, Vienna, Austria — ³University of Tübingen, Tübingen, Germany

We present the advancements in the implementation of a recently proposed scheme for a non-perturbative treatment of strongly correlated fermion systems. This approach, called DMF²RG, combines the local strong-coupling treatment of dynamical mean field theory (DMFT) and the non-local one of functional renormalization group (fRG). In our improved algorithmic implementation the full frequency dependence of the local DMFT vertex is retained in the flow. We show results for the one band 2D Hubbard model and compare them against other techniques.