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bilayer lieb lattice 1edge states 1flat bands 1pseudo-spin cern number 1time-reversal symmetry 1topological metals 1

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quant-ph2025

Reversing non-Hermitian skin accumulation with a non-local transverse switch

Mengjie Yang, Ching Hua Lee

Asymmetrically directed couplings in non-Hermitian systems cause directional amplification that leads to boundary skin state accumulation. However, counter-intuitively, the directi…