97 citations · 240 across the 7 of their papers we have counts for
7 papers
Competition between antiferromagnetic and charge density wave fluctuations in the extended Hubbard model
Petra Pudleiner, Anna Kauch, Karsten Held +1
By extending our {\it victory} implementation of the parquet approach to include non-local Coulomb interactions, we study the extended Hubbard model on the two-dimensional square l…
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…
Parquet approximation for molecules: spectrum and optical conductivity of the Pariser-Parr-Pople model
Petra Pudleiner, Patrik Thunström, Angelo Valli +3
We study a simple model system for the conjugated -bonds in benzene, the Pariser-Parr-Pople (PPP) model, within the parquet approximation (PA), exemplifying the prospects of the…
The {\it victory} project v1.0: an efficient parquet equations solver
Gang Li, Anna Kauch, Petra Pudleiner +1
{\it Victory}, i.e. \underline{vi}enna \underline{c}omputational \underline{to}ol deposito\underline{ry}, is a collection of numerical tools for solving the parquet equations for t…
Momentum structure of the self-energy and its parametrization for the two-dimensional Hubbard model
Petra Pudleiner, Thomas Schäfer, Daniel Rost +3
We compute the self-energy for the half-filled Hubbard model on a square lattice using lattice quantum Monte Carlo simulations and the dynamical vertex approximation. The self-ener…
Efficient implementation of the parquet equations -- role of the reducible vertex function and its kernel approximation
Gang Li, Nils Wentzell, Petra Pudleiner +2
We present an efficient implementation of the parquet formalism which respects the asymptotic structure of the vertex functions at both single- and two-particle levels in momentum-…
Interacting bosons in two-dimensional flat band systems
Petra Pudleiner, Andreas Mielke
The Hubbard model of bosons on two dimensional lattices with a lowest flat band is discussed. In these systems there is a critical density, where the ground state is known exactly…