81 citations · 236 across the 11 of their papers we have counts for
3 papers · 1 filter
Superperturbation theory on the real-axis
Christoph Jung, Aljoscha Wilhelm, Hartmut Hafermann +2
In this article we formulate the superperturbation theory for the Anderson impurity model on the real axis. The resulting impurity solver allows to evaluate dynamical quantities wi…
Dual-Fermion approach to Non-equilibrium strongly correlated problems
C. Jung, A. Lieder, S. Brener +6
We present a generalization of the recently developed dual fermion approach introduced for correlated lattices to non-equilibrium problems. In its local limit, the approach has bee…
Superperturbation solver for quantum impurity models
Hartmut Hafermann, Christoph Jung, Sergey Brener +3
We present a very efficient solver for the general Anderson impurity problem. It is based on the perturbation around a solution obtained from exact diagonalization using a small nu…