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

  title={Comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems},
  author={Sharareh Sayyad and Rok Žitko and Hugo U. R. Strand and Philipp Werner and Denis Gole{\vz}},
  journal={Physical Review B},
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 low-energy properties of the electron-boson coupled systems can be reproduced by an effective static electron… 
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