Observation of topological edge states in parity-time-symmetric quantum walks

@inproceedings{Xiao2017ObservationOT,
  title={Observation of topological edge states in parity-time-symmetric quantum walks},
  author={Lei Xiao and Xiang Xu Zhan and Zhihao Bian and Kunkun Wang and Xin Zhang and Xiaoping Wang and Jian Ren Li and Ken Mochizuki and Dakyeong Kim and Norio Kawakami and Wei Yi and Hideaki Obuse and Barry C. Sanders and Peng Xue},
  year={2017}
}
Spontaneous parity–time-symmetry breaking and topological edge states are observed in a photonic non-Hermitian system — a quantum walk interferometer. 
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