74 citations · 95 across the 2 of their papers we have counts for
4 papers
Collective fields in the functional renormalization group for fermions, Ward identities, and the exact solution of the Tomonaga-Luttinger model
Florian Schuetz, Lorenz Bartosch, Peter Kopietz
We develop a new formulation of the functional renormalization group (RG) for interacting fermions. Our approach unifies the purely fermionic formulation based on the Grassmannian…
What are spin currents in Heisenberg magnets?
Florian Schuetz, Peter Kopietz, Marcus Kollar
We discuss the proper definition of the spin current operator in Heisenberg magnets subject to inhomogeneous magnetic fields. We argue that only the component of the naive "current…
Comment on ''Direct Current in Mesoscopic Rings Induced by High-Frequency Electromagnetic Field''
Peter Kopietz, Axel Voelker
see cond-mat/0002050
Calculation of the single-particle Green's function of interacting fermions in arbitrary dimension via functional bosonization
Peter Kopietz
The single-particle Green's function of an interacting Fermi system with dominant forward scattering is calculated by decoupling the interaction by means of a Hubbard-Stratonowich…