articlePhysical Review LettersAug 12, 2022Closed access

Dynamic Signatures of Non-Hermitian Skin Effect and Topology in Ultracold Atoms

QLQian LiangDXDizhou XieZDZhaoli DongHLHaowei LiHLHang Li

State Key Laboratory of Modern Optical Instruments · Zhejiang University of Technology · +2 more institutions

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Abstract

The non-Hermitian skin effect (NHSE), the accumulation of eigen-wave functions at boundaries of open systems, underlies a variety of exotic properties that defy conventional wisdom. While the NHSE and its intriguing impact on band topology and dynamics have been observed in classical or photonic systems, their demonstration in a quantum gas system remains elusive. Here we report the experimental realization of a dissipative Aharonov-Bohm chain-non-Hermitian topological model with NHSE-in the momentum space of a two-component Bose-Einstein condensate. We identify signatures of the NHSE in the condensate dynamics, and perform Bragg spectroscopy to resolve topological edge states against a background of localized…

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Topics & keywords

Topics
Keywords
  • Physics
  • Hermitian matrix
  • Topology (electrical circuits)
  • Realization (probability)
  • Wave function
  • Dissipative system
  • Bose–Einstein condensate
  • Quantum
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