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    Université de Fribourg

    Comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems

    Sayyad, Sharareh ; Žitko, Rok ; Strand, Hugo U. R. ; Werner, Philipp ; Golež, Denis

    In: Physical Review B, 2019, vol. 99, no. 4, p. 045118

    We study equilibrium and nonequilibrium properties of electron-phonon systems described by the Hubbard-Holstein model using dynamical mean-field theory. In equilibrium, we benchmark the results for impurity solvers based on the one-crossing approximation and slave-rotor approximation against non-perturbative numerical renormalization group reference data. We also examine how well the...