63 citations · 260 across the 9 of their papers we have counts for
9 papers
Ladder equation for the three-particle vertex and its approximate solution
Patrick Kappl, Tin Ribic, Anna Kauch +1
We generalize the three two-particle Bethe-Salpeter equations to ten three-particle ladders. These equations are exact and yield the exact three-particle vertex, if we knew the thr…
Parquet dual fermion approach for the Falicov-Kimball model
Katharina Astleithner, Anna Kauch, Tin Ribic +1
In the Falicov-Kimball model, a model for (annealed) disorder, we expect weak localization corrections to the optical conductivity. However, we get such weak localization effects o…
Generic optical excitations of correlated systems: -tons
Anna Kauch, Petra Pudleiner, Katharina Astleithner +3
The interaction of light with solids gives rise to new bosonic quasiparticles, with the exciton being---undoubtedly---the most famous of these polaritons. While excitons are the ge…
Impact of self-consistency in dual fermion calculations
Tin Ribic, Patrik Gunacker, Karsten Held
The dual fermion (DF) method allows for calculating corrections due to non-local correlations relative to an effective impurity model. Choosing the impurity as that of a dynamical…
Role of three-particle vertex within dual fermion calculations
T. Ribic, P. Gunacker, S. Iskakov +5
We investigate the influence of self-energy diagrams beyond the two-particle vertex level within dual fermion theory. Specifically, we calculate the local three-particle vertex and…
Local correlation functions of arbitrary order for the Falicov-Kimball model
Tin Ribic, Georg Rohringer, Karsten Held
Local n-particle vertex functions represent the crucial ingredient for all diagrammatic extensions of dynamical mean field theory (DMFT). Hitherto their application has been restri…
Worm Improved Estimators in Continuous-time Quantum Monte Carlo
Patrik Gunacker, Markus Wallerberger, Tin Ribic +3
We derive the improved estimators for general interactions and employ these for the continuous-time quantum Monte Carlo method. Using a worm algorithm we show how measuring higher-…
Nonlocal correlations and spectral properties of the Falicov-Kimball model
T. Ribic, G. Rohringer, K. Held
We derive an analytical expression for the local two-particle vertex of the Falicov-Kimball model, including its dependence on all three frequencies, the full vertex and all reduci…
Cubic interaction parameters for t2g Wannier orbitals
T. Ribic, E. Assmann, A. Toth +1
Many-body calculations for multi-orbital systems at present typically employ Slater or Kanamori interactions which implicitly assume a full rotational invariance of the orbitals, w…