Non-Hermitian Avalanche Effect: Non-Perturbative Effect Induced by Local Non-Hermitian Perturbation on a Z2 Topological Order

13 Jan 2020 Guo Cui-Xian Wang Xiao-Ran Kou Su-Peng

In this paper, based on a non-Hermitian toric-code model, we surprisingly find that the degeneracy of ground states can be changed by a local non-Hermitian perturbation (even in thermodynamic limit). We call it non-Hermitian avalanche effect... (read more)

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Categories


  • MESOSCALE AND NANOSCALE PHYSICS
  • STRONGLY CORRELATED ELECTRONS