SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 43: Poster: Correlated Electrons II

TT 43.22: Poster

Mittwoch, 29. März 2023, 15:00–18:00, P2/OG3

Configuration interaction based nonequilibrium steady state impurity solver for the Anderson-Holstein model — •Daniel Werner and Enrico Arrigoni — ITPCP, Graz, Austria

Recently we developed a non-equilibrium impurity solver based on the Auxiliary Master Equation Approach using Configuration Interaction (CI). This allowed us to treat a larger auxiliary system, which can more accurately model physical environments with more challenging hybridization functions, as compared to ED. Due to the promising results we obtained, we extended the solver to include phonons, since this gives access to interesting physical phenomena. In particular we are investigating the vibrational steps in the differential conductance in the Kondo regime. We limited ourselves to a single phonon mode, i.e. Holstein phonons, which we again treated with CI to keep the increase of the state space low. Preliminary results, as well as possible extensions for a more complicated treatment of phonons are being discussed.