SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 43: Poster: Correlated Electrons II

TT 43.26: Poster

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

Nonequilibrium steady-states in photodoped Mott insulators — •Fabian Künzel — Universität Hamburg, Hamburg, Germany

Photodoped states in Mott insulators are peculiar states which simultaneously host strongly correlated electron and hole-like carriers, and can show instabilities into various non-thermal orders. Here we stabilize a stationary photodoped state in a Mott insulator using Dynamical-Mean-Field-Theory (DMFT) in the nonequilibrium steady-state formalism. This formalism provides a description of the longtime dynamics of microscopic models with well separated timescales. The photodoping can be established by coupling the Hubbard model with external baths that pump holon and doublon excitations in the Hubbard bands. In particular, we develop an algorithm to stabilize DMFT solutions with a prescribed nonthermal distribution function in the local Green's functions. This formulation may allow for a nonperturbative solution of the DMFT impurity model, using methods like Quantum Monte Carlo, and it opens the possibility to study the dynamics of photodoped states using a Quantum Boltzmann equation.

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