Robust Nonequilibrium Edge Currents with and without Band Topology.

  title={Robust Nonequilibrium Edge Currents with and without Band Topology.},
  author={Mark T. Mitchison and {\'A}ngel Rivas and Miguel A. Martin-Delgado},
  journal={Physical review letters},
  volume={128 12},
We study two-dimensional bosonic and fermionic lattice systems under nonequilibrium conditions corresponding to a sharp gradient of temperature imposed by two thermal baths. In particular, we consider a lattice model with broken time-reversal symmetry that exhibits both topologically trivial and nontrivial phases. Using a nonperturbative Green function approach, we characterize the nonequilibrium current distribution in different parameter regimes. For both bosonic and fermionic systems, we… 
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