6 papers
Strong correlations and local self-energies from on-site ensembles
Alberto Carta, Hugo U. R. Strand, Michael Schüler +1
Addressing the many-body electronic-structure problem is a central goal of modern condensed-matter physics. Paramagnetic Mott insulators, in particular, have long represented a cha…
Benchmarking the Dual Fermion approach on the Falicov-Kimball model
Akshat Mishra, Hugo U. R. Strand, Erik G. C. P. van Loon
Strong electronic correlations generally require non-perturbative treatment. Local correlations are captured by dynamical mean-field theory while nonlocal correlations can be treat…
NESSi 2.0: The Non-Equilibrium Systems Simulation package version 2.0
Fabian Künzel, Michael Schüler, Denis Golež +7
Nonequilibrium Green's functions provide a powerful framework for studying quantum many-body dynamics including the laser-induced dynamics in solids. The Non-Equilibrium Systems Si…
Nonlocal Correlation Effects in dc and Optical Conductivity of the Hubbard Model
Nagamalleswararao Dasari, Hugo U. R. Strand, Martin Eckstein +2
Conductivity is one of the most direct probes of electronic systems, yet its theoretical description remains challenging in the presence of strong non-local correlations. In this L…
Driving collective current excitations using light: The two-time approach
Chin Shen Ong, Denis Golež, Angel Rubio +2
We identify a distinct transverse collective excitation, which we name the "curron", arising from current-current interactions in a driven quantum metal. Unlike plasmons, which inv…
Electron-magnon dynamics triggered by an ultrashort laser pulse: A real-time Dual study
Nagamalleswararao Dasari, Hugo U. R. Strand, Martin Eckstein +2
Ultrafast irradiation of correlated electronic systems triggers complex dynamics involving quasi-particle excitations, doublons, charge carriers, and spin fluctuations. To describe…