In a nonlinear Hatano-Nelson model and a microwave metamaterial, increasing the field intensity reverses the non-Hermitian skin effect, switching the edge localization from one end of the lattice to the other, and the third harmonic generated by the nonlinearity inherits the reversed localization.
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Observation of localization reversal and harmonic generation in nonlinear non-Hermitian skin effect
In a nonlinear Hatano-Nelson model and a microwave metamaterial, increasing the field intensity reverses the non-Hermitian skin effect, switching the edge localization from one end of the lattice to the other, and the third harmonic generated by the nonlinearity inherits the reversed localization.