标题： 揭示驱动$\mathcal{PT}$对称系统中奇异点的自正交性 显示英文标题

标题： Unveiling the Self-Orthogonality at Exceptional Points in Driven $\mathcal{PT}$-Symmetric Systems

摘要： 我们探讨了非厄米宇称-时间对称系统中奇异点（EPs）的自正交性影响。 使用一个受驱动的三带格点模型，我们表明，当系统接近奇异点时，由于本征态的合并，拉比频率会发散。 我们证明这种发散在实验可访问的功率振荡中表现出来，从而建立了一个直接可观测的自正交性指标。 我们的结果为在各种超材料平台中探测奇异点物理提供了一条路径。 显示英文摘要

摘要： We explore the effect of self-orthogonality at exceptional points (EPs) in non-Hermitian Parity-Time-symmetric systems. Using a driven three-band lattice model, we show that the Rabi frequency diverges as the system approaches an EP due to the coalescence of eigenstates. We demonstrate that this divergence manifests in experimentally accessible power oscillations, establishing a direct observable for self-orthogonality. Our results provide a pathway for probing EP physics in various metamaterial platforms.