From Infinite to Two Dimensions through the Functional Renormalization Group

Autor(en)

C. Taranto, S. Andergassen, J. Bauer, K. Held, A. Katanin, W. Metzner, G. Rohringer, A. Toschi

Abstrakt

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

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Harvard University, Ural Federal University, Max-Planck-Institut für Festkörperforschung, Technische Universität Wien

Journal

Physical Review Letters

Band

112

Anzahl der Seiten

5

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.112.196402

Publikationsdatum

05-2014

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103032 Strömungslehre

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ef212dc4-795c-4de3-8b07-119bc2c3d16a