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TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.70: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P2
Singular-mode functional renormalization group vs. Fermi surface patching: A comparison of two FRG schemes applied to the 2D Hubbard model — •Julian Lichtenstein1 and Carsten Honerkamp1,2 — 1Institute for Theoretical Solid State Physics, RWTH Aachen University, Germany — 2JARA - Fundamentals of Future Information Technology
We analyze the capabilities of the singular-mode functional
renormalization group (SM-FRG) which was introduced in [1]. The most important dependencies of
the two particle vertex on Matsubara frequencies are included in our
implementation. Moreover, the role of the self energy feedback has been
investigated. We apply this method to the 2D Hubbard model and compare
the results to those from previous studies that have used FRG via Fermi
surface patching.
W.-S. Wang et
al., Phys. Ref. B 85 (2012) 035414