论文标题
量子增强了光学频率梳子的测量
Quantum Enhanced Measurement of an Optical Frequency Comb
论文作者
论文摘要
测量光频梳的光谱特性是精确计量学的最基本任务之一。与一般的单参数测量方案相反，我们在这里演示了单个射击多参数估计在标准量子限制的情况下和之后。超快脉冲的平均能量和中心频率是用多像素 - 光谱分辨（MPSR）设备同时确定的，而无需更改光子体结构。此外，使用量子频率梳子，该量子梳子由Hermite-Gaussian光谱/时间模式的多个挤压状态组成，平均能量的信噪比和中央频率测量值分别超过了射击限制的19％和15％。结合我们的多像素检测方案和内在的多模量子资源可以找到超快量子计量学和多模量子信息处理中的应用。
Measuring the spectral properties of an optical frequency comb is among the most fundamental tasks of precision metrology. In contrast to general single-parameter measurement schemes, we demonstrate here single shot multiparameter estimation at and beyond the standard quantum limit. The mean energy and the central frequency of ultrafast pulses are simultaneously determined with a multi-pixel-spectrally-resolved (MPSR) apparatus, without changing the photonics architecture. Moreover, using a quantum frequency comb that consists of multiple squeezed states in a family of Hermite-Gaussian spectral/temporal modes, the signal-to-noise ratios of the mean energy and the central frequency measurements surpass the shot-noise limit by around 19% and 15%, respectively. Combining our multi-pixel detection scheme and the intrinsic multimode quantum resource could find applications in ultrafast quantum metrology and multimode quantum information processing.
