74 citations · 95 across the 2 of their papers we have counts for
2 papers
cond-mat.str-el2004★ 74 cited
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…
cond-mat.mes-hall2004★ 21 cited
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…