Many remarkable properties of quantum materials emerge from states with intricate coupling
between the charge, spin and orbital degrees of freedom. Ultrafast photo-excitation of these …

We propose a method to improve the computational and memory efficiency of numerical
solvers for the nonequilibrium Dyson equation in the Keldysh formalism. It is based on the …

Simulations of interacting electrons and bosons out of equilibrium, starting from first
principles and aiming at realistic multiscale scenarios, is a grand theoretical challenge …

We present a deterministic algorithm for the efficient evaluation of imaginary-time diagrams
based on the recently introduced discrete Lehmann representation (DLR) of imaginary-time …

We investigate the efficiency of the recently proposed Restricted Boltzmann Machine (RBM)
representation of quantum many-body states to study both the static properties and quantum …

Charge excitations across an electronic band gap play an important role in opto-electronics
and light harvesting. In contrast to conventional semiconductors, studies of above-band-gap …

The interaction of electrons with quantized phonons and photons underlies the ultrafast
dynamics of systems, ranging from molecules to solids, giving rise to a plethora of physical …

Although ultrafast manipulation of magnetism holds great promise for new physical
phenomena and applications, targeting specific states is held back by our limited …

Time-and angular-resolved photoemission spectroscopy (trARPES) can directly probe the
electronic structure of quantum materials out of equilibrium. This can shed light on the …

The first indication of a pseudogap in cuprates came from a sudden decrease of the NMR
Knight shift at a doping-dependent temperature T*(δ). Since then, experiments have found …