74 citations · 98 across the 3 of their papers we have counts for
7 papers
Dynamic structure factor of Luttinger liquids with quadratic energy dispersion and long-range interactions
Peyman Pirooznia, Florian Schuetz, Peter Kopietz
We calculate the dynamic structure factor S (omega, q) of spinless fermions in one dimension with quadratic energy dispersion k^2/2m and long range density-density interaction whos…
Landau functions for non-interacting bosons
Andreas Sinner, Florian Schuetz, Peter Kopietz
We discuss the statistics of Bose-Einstein condensation (BEC) in a canonical ensemble of N non-interacting bosons in terms of a Landau function L_N^{BEC} (q) defined by the logarit…
Functional renormalization group with vacuum expectation values and spontaneous symmetry breaking
Florian Schuetz, Peter Kopietz
We generalize our recently developed super-field functional renormalization group (RG) method involving both Fermi and Bose fields [F. Schuetz, L. Bartosch, and P. Kopietz, Phys. R…
Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field
Nils Hasselmann, Florian Schuetz, Ivan Spremo +1
We derive the effective long-wavelength Euclidean action for the antiferromagnetic spin-waves of ordered quantum antiferromagnets subject to a uniform magnetic field. We point out…
Magnetic properties of a metal-organic antiferromagnet on a distorted honeycomb lattice
Ivan Spremo, Florian Schuetz, Peter Kopietz +6
For temperatures T well above the ordering temperature T*=3.0+-0.2K the magnetic properties of the metal-organic material Mn[C10H6(OH)(COO)]2x2H20 built from Mn^2+ ions and 3-hydro…
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…