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quant-ph2019★ 37 cited
Flat band in two-dimensional non-Hermitian optical lattices
S. M. Zhang, L. Jin
We propose a method to generate a real-energy flat band in a two-dimensional (2D) non-Hermitian Lieb lattice. The coincidence of the flat band eigenstate in both real and momentum…
quant-ph2018
Sensitivity of parameter estimation near the exceptional point of a non-Hermitian system
Chong Chen, Liang Jin, Ren-Bao Liu
The exceptional points of non-Hermitian systems, where different energy eigenstates merge into an identical one, have many intriguing properties that have no counterparts in He…