[Zurück]

C. Taranto, S. Andergassen, J. Bauer, K. Held, A. Katanin, W. Metzner, G. Rohringer, A. Toschi:
"From Infinite to Two Dimensions through the Functional Renormalization Group";
Physical Review Letters, 112 (2014), 196402.

We present a novel scheme for an unbiased, non-perturbative treatment of strongly correlated
fermions. The proposed approach combines two of the most successful many-body methods, the
dynamical mean field theory (DMFT) and the functional renormalization group (fRG). Physically,
this allows for a systematic inclusion of non-local correlations via the fRG flow equations, after
the local correlations are taken into account non-perturbatively by the DMFT. To demonstrate the
feasibility of the approach, we present numerical results for the two-dimensional Hubbard model at
half-filling.

http://dx.doi.org/10.1103/PhysRevLett.112.196402