4 papers
Green's function of non-Hermitian systems at exceptional deficiency
Congwei Lu, Guancong Ma
Exceptional deficiency is a newly discovered broadband non-Hermitian condition, at which the system's spectrum is entirely composed of exceptional points and all eigenvectors pairw…
Massive coherent equipartition of light by the geometric phase of null space
Xiangrui Hou, Dongyi Wang, Fangyu Wang +3
Light source is a foundational to photonic science and technology. However, a significant challenge remains in generating and distributing coherent light from a single on-chip sour…
Observation of flat-band skin effect
Xulong Wang, Dongyi Wang, Congwei Lu +4
Symmetry-protected ideal flat bands in one-dimensional (1D) Hermitian lattices are populated by compact localized states (CLS) - a special class of localization with wavefunctions…
Observation of the Exceptional Skin Effect on a Non-Hermitian Flat band
Dongyi Wang, Ruoyang Zhang, Chinghua Lee +2
Flat band and non-Hermitian are both significant conceptions in modern physics. In this study, we delve into the behaviours of flat bands in non-Hermitian systems, focusing on the…