74 citations · 149 across the 10 of their papers we have counts for
11 papers
Real-time Dyson expansion for the nonequilibrium approximation: Correlated spectra and dependence on the reference propagator
Erik Schroedter, Jan-Philip Joost, Michael Bonitz +1
Electronic spectra provide direct insight into the excitations and correlations of condensed matter systems. Their description requires electron correlations beyond mean field. In…
Nonequilibrium Green Functions Simulations for Large Correlated Systems
Erik Schroedter, Michael Bonitz, Jan-Philip Joost
Correlated real-time dynamics in large, spatially inhomogeneous quantum systems remain difficult to access with nonequilibrium many-body methods. Two-time nonequilibrium Green func…
Electronic correlation effects in the response of graphene and MoS2 monolayers to the impact of highly-charged ions
Giorgio Lovato, Michael Bonitz, Karsten Balzer +2
The interaction of highly-charged ions with monolayers of graphene and MoS2 is theoretically investigated based on nonequilibrium Green Functions (NEGF). In a recent paper [Niggas…
Ultrafast Charge Separation Induced by a Uniform Field in Graphene Nanoribbons
Jan-Philip Joost, Michael Bonitz
When heteronuclear molecules are illuminated by light of spatially uniform intensity, electronic excitations may, nevertheless, be restricted to parts of the system, depending on t…
The 2025 Roadmap to Ultrafast Dynamics: Frontiers of Theoretical and Computational Modelling
Fabio Caruso, Michael A. Sentef, Claudio Attaccalite +27
The exploration of ultrafast phenomena is a frontier of condensed matter research, where the interplay of theory, computation, and experiment is unveiling new opportunities for und…
Löwdin's symmetry dilemma within Green functions theory for the one-dimensional Hubbard model
J. -P. Joost, N. Schlünzen, S. Hese +4
The energy gap of correlated Hubbard clusters is well studied for one-dimensional systems using analytical methods and density-matrix-renormalization-group (DMRG) simulations. Beyo…
Comment on "On the unphysical solutions of the Kadanoff--Baym equations in linear response: Correlation-induced homogeneous density-distribution and attractors"
N. Schlünzen, J. -P. Joost, M. Bonitz
In a recent Rapid Communication [A. Stan, Phys. Rev. B \textbf{93}, 041103(R) (2016)], the reliability of the Keldysh--Kadanoff--Baym equations (KBE) using correlated selfenergy ap…
Few-particle quantum dynamics---comparing Nonequilibrium Green's functions with the generalized Kadanoff-Baym ansatz to density operator theory
S. Hermanns, K. Balzer, M. Bonitz
The nonequilibrium description of quantum systems requires, for more than two or three particles, the use of a reduced description to be numerically tractable. Two possible approac…
Electronic correlations in double ionization of atoms in pump-probe experiments
S. Bauch, K. Balzer, M. Bonitz
The ionization dynamics of a two-electron atom in an attosecond XUV-infrared pump-probe experiment is simulated by solving the time-dependent two-electron Schrödinger equation. A d…
Efficient grid-based method in nonequilibrium Green's function calculations. Application to model atoms and molecules
K. Balzer, S. Bauch, M. Bonitz
We propose and apply the finite-element discrete variable representation to express the nonequilibrium Green's function for strongly inhomogeneous quantum systems. This method is h…
Nonequilibrium properties of strongly correlated artificial atoms - a Green's functions approach
K Balzer, M Bonitz
A nonequilibrium Green's functions (NEGF) approach for spatially inhomogeneous, strongly correlated artificial atoms is presented and applied to compute the time-dependent properti…