Non-Hermitian bulk–boundary correspondence in quantum dynamics

@article{Xiao2020NonHermitianBC,
  title={Non-Hermitian bulk–boundary correspondence in quantum dynamics},
  author={Lei Xiao and Tianshu Deng and Kunkun Wang and Gaoyan Zhu and Zhong Wang and Wei Yi and Peng Xue},
  journal={Nature Physics},
  year={2020},
  volume={16},
  pages={761-766}
}
Bulk–boundary correspondence, a guiding principle in topological matter, relates robust edge states to bulk topological invariants. Its validity, however, has so far been established only in closed systems. Recent theoretical studies indicate that this principle requires fundamental revisions for a wide range of open systems with effective non-Hermitian Hamiltonians. Therein, the intriguing localization of nominal bulk states at boundaries, known as the non-Hermitian skin effect, suggests a non… 
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