论文标题
在周期性频率调制下，广义平价在两级系统的荧光光谱对称性中的作用
Role of generalized parity in the symmetry of fluorescence spectrum from two-level systems under periodic frequency modulation
论文作者
论文摘要
我们研究了受到低频周期性调制的两级系统的荧光光谱对称性的起源，并通过使用基于浮雕理论的分析和数值方法来进行低频周期性调制和近乎共振的高频单色激发。我们发现，光谱对称性的基本起源可以归因于浮子状态的广义奇偶校验的存在，这取决于驱动参数。普遍的平价不存在会导致光谱的不对称性。基于普遍的平等性，可以得出频谱的对称和不对称条件，从而成功预测了谐波，双向和多辅助调制的光谱的对称性和不对称性。此外，我们发现在分析计算中广泛使用的世俗近似可能导致避免这种近似值时消失的光谱的伪影对称性。本研究提供了有关光谱对称性的起源的重要视角。
We study the origin of the symmetry of the fluorescence spectrum from the two-level system subjected to a low-frequency periodic modulation and a near-resonant high-frequency monochromatic excitation by using the analytical and numerical methods based on the Floquet theory. We find that the fundamental origin of symmetry of the spectrum can be attributed to the presence of the generalized parity of the Floquet states, which depends on the driving parameters. The absence of the generalized parity can lead to the asymmetry of the spectrum. Based on the generalized parity, the conditions for the symmetry and asymmetry of the spectrum can be derived, which succeeds in predicting symmetry and asymmetry of the spectrum for the harmonic, biharmonic, and multiharmonic modulations. Moreover, we find that the secular approximation widely used in the analytical calculation may lead to artifact symmetry of the spectrum that vanishes when such approximation is avoided. The present study provides a significant perspective on the origin of the symmetry of the spectrum.
