Non-Hermitian skin effect and self-acceleration

  title={Non-Hermitian skin effect and self-acceleration},
  author={Stefano Longhi},
  journal={Physical Review B},
  • S. Longhi
  • Published 22 June 2022
  • Physics
  • Physical Review B
Non-Hermitian systems exhibit nontrivial band topology and a strong sensitivity of the energy spectrum on the boundary conditions. Remarkably, a macroscopic number of bulk states get squeezed toward the lattice edges under open boundary conditions, an effect dubbed the non-Hermitian skin effect (NHSE). A well-established dynamical signature of the NHSE in real space is the directional bulk flow (or persistent current) for arbitrary initial excitation of the system, which is observed at long times… 

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