论文标题
非线性缺陷模式的非热CT对称光谱保护
Non-Hermitian CT-Symmetric Spectral Protection of Nonlinear Defect Modes
论文作者
论文摘要
我们使用一个微波平台进行研究，该平台由耦合电介质谐振器的非热su-schrieffer-Heeger阵列组成，这是缺陷模式形成中有损的非线性和CT对称性的相互作用。测量值与以下理论相吻合，该理论可以预测，最多到中等泵送，缺陷模式是CT对称操作员的本征态，并将其频率保留在间隙的中心。在较高的泵浦值下，系统经历了自我诱导的显式\ ct对称违规行为，从而消除了频谱拓扑保护并改变了缺陷模式的形状。
We investigate, using a microwave platform consisting of a non-Hermitian Su-Schrieffer-Heeger array of coupled dielectric resonators, the interplay of a lossy nonlinearity and CT-symmetry in the formation of defect modes. The measurements agree with the theory which predicts that, up to moderate pumping, the defect mode is an eigenstate of the CT-symmetric operator and retains its frequency at the center of the gap. At higher pumping values, the system undergoes a self-induced explicit \CT-symmetry violation which removes the spectral topological protection and alters the shape of the defect mode.
