51 citations · 134 across the 6 of their papers we have counts for
6 papers
Confined coherence in quasi-one-dimensional metals
Sascha Ledowski, Peter Kopietz
We present a functional renormalization group calculation of the effect of strong interactions on the shape of the Fermi surface of weakly coupled metallic chains. In the regime wh…
Fermi surface renormalization and confinement in two coupled metallic chains
Sascha Ledowski, Peter Kopietz
Using a non-perturbative functional renormalization group approach involving both fermionic and bosonic fields we calculate the interaction-induced change of the Fermi surface of s…
Self-consistent Fermi surface renormalization of two coupled Luttinger liquids
Sascha Ledowski, Peter Kopietz, Alvaro Ferraz
Using functional renormalization group methods, we present a self-consistent calculation of the true Fermi momenta k_F^a (antibonding band) and k_F^b (bonding band) of two spinless…
Critical behavior of weakly interacting bosons: A functional renormalization group approach
Nils Hasselmann, Sascha Ledowski, Peter Kopietz
We present a detailed investigation of the momentum-dependent self-energy Sigma(k) at zero frequency of weakly interacting bosons at the critical temperature T_c of Bose-Einstein c…
Self-energy and critical temperature of weakly interacting bosons
Sascha Ledowski, Nils Hasselmann, Peter Kopietz
Using the exact renormalization group we calculate the momentum-dependent self-energy Sigma (k) at zero frequency of weakly interacting bosons at the critical temperature T_c of Bo…
Exact integral equation for the renormalized Fermi surface
Sascha Ledowski, Peter Kopietz
The true Fermi surface of a fermionic many-body system can be viewed as a fixed point manifold of the renormalization group (RG). Within the framework of the exact functional RG we…