Many-Body Dynamics and Gap Opening in Interacting Periodically Driven Systems.

  title={Many-Body Dynamics and Gap Opening in Interacting Periodically Driven Systems.},
  author={Ervand Kandelaki and Mark S. Rudner},
  journal={Physical review letters},
  volume={121 3},
We study transient dynamics in a two-dimensional system of interacting Dirac fermions subject to a quenched drive with circularly polarized light. In the absence of interactions, the drive opens a gap at the Dirac point in the quasienergy spectrum, inducing nontrivial band topology. We investigate the dynamics of this gap opening process, taking into account the essential role of electron-electron interactions. Crucially, scattering due to interactions (1) induces dephasing, which erases memory… 
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