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quant-ph2026
Scale-Free Response with Directional Amplification in Critical Non-Hermitian Systems
Kunling Zhou, Zihe Yang, Bowen Zeng +1
The non-Hermitian skin effect can lead to directional amplification of response, with the associated end-to-end Green's function generally exhibiting size dependence. Any deviation…
quant-ph2025
Non-Hermitian Aharonov-Bohm Cage in Bosonic Bogoliubov-de Gennes Systems
Kunling Zhou, Bowen Zeng, Yong Hu
The non-Hermitian Aharonov-Bohm (AB) cage is a unique localization phenomenon that confines all possible excitations. This confinement leads to fully flat spectra in momentum space…
quant-ph2024
Observation of Quantized Klein Tunneling in a Dielectric Resonator Chain
Rui-Jie Zhang, Xiao-Zhen Peng, Ri-Zhen Yang +4
We present the first experimental observation of quantized Klein tunneling in a bounded Dirac system, implemented by a dimer chain of dielectric microwave resonators. Both the unus…