Non-equilibrium photon correlations of coherently excited single quantum systems can reveal their internal quantum dynamics and provide spectroscopic access. Here we propose and discuss the fundamentals of a coherent photon coincidence spectroscopy based on the application of laser pulses with variable delay and the detection of a time-averaged two-photon coincidence rate. For demonstration, two simple but important cases, i.e., an exciton – biexciton in a quantum dot and two coupled quantum emitters, are investigated based on quantum dynamics simulations demonstrating that this nonlinear spectroscopy reveals information specific to the particular single quantum system. {PhySH: }Femtosecond laser spectroscopy, Single molecule techniques, Optical spectroscopy, Coherent control, Quantum coherence {&} coherence measures …

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单量子系统的相干光子符合光谱

相干激发的单量子系统的非平衡光子相关性可以揭示其内部量子动力学，并提供光谱访问。在此，我们提出并讨论了基于可变延迟激光脉冲的应用和时间平均两光子重合率检测的相干光子重合光谱学的基本原理。为了演示，基于量子动力学模拟研究了两个简单但重要的情况，即量子点中的激子-双激子和两个耦合的量子发射体，表明这种非线性光谱揭示了特定于单个量子系统的信息。{PhySH：}飞秒激光光谱学，单分子技术，光谱学，相干控制，量子相干{＆}相干测量…