Peierls to superfluid crossover in the one-dimensional, quarter-filled Holstein model

@article{Hohenadler2013PeierlsTS,
  title={Peierls to superfluid crossover in the one-dimensional, quarter-filled Holstein model},
  author={Martin Hohenadler and Fakher F. Assaad},
  journal={Journal of Physics: Condensed Matter},
  year={2013},
  volume={25}
}
We use continuous-time quantum Monte Carlo simulations to study retardation effects in the metallic, quarter-filled Holstein model in one dimension. Based on results which include the one- and two-particle spectral functions as well as the optical conductivity, we conclude that with increasing phonon frequency the ground state evolves from one with dominant diagonal order—2kF charge correlations—to one with dominant off-diagonal fluctuations, namely s-wave pairing correlations. In the parameter… 

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