5 papers · 1 filter
Impact of noise on nonlinear-exceptional-point-based sensors
Kai Bai, Chen Lin, Meng Xiao
Nonlinear exceptional points (NEPs), a new type of spectral singularity in nonlinear non-Hermitian systems, are expected to address the noise divergence issue encountered at linear…
Recent advances in the combination of nonlinearity and exceptional points
Kai Bai, Chen Lin, Jia-Zheng Li +1
The exotic physics emerging at singularities has long attracted intense theoretical and experimental attention. In non-Hermitian systems, exceptional points (EPs), unique spectral…
Observation of Arbitrarily Configurable Nonlinear Topological Modes
Kai Bai, Chen Lin, Jia-Zheng Li +3
Nonlinear topology is an emerging field that combines the intrinsic reconfigurability of nonlinear systems with the robustness of topological protection, offering fertile ground fo…
Exceptional features in nonlinear Hermitian systems
Liang Fang, Kai Bai, Cheng Guo +3
Non-Hermitian systems and their topological singularities, such as exceptional points (EPs), lines, and surfaces, have recently attracted intense interest. The investigation of the…
Controlling quasi-parametric amplifications: From multiple PT-symmetry phase transitions to non-Hermitian sensing
Xiaoxiong Wu, Kai Bai, Penghong Yu +7
Quasi-parametric amplification (QPA) is a nonlinear interaction in which the idler wave is depleted through some loss mechanism. QPA plays an important role in signal amplification…