论文标题
电磁真空波动的量子电声采样中的背部动作
Back action in quantum electro-optic sampling of electromagnetic vacuum fluctuations
论文作者
论文摘要
研究了测量背部作用对电磁量子波动的电用量采样的影响。基于对近红外相干探头和中红外真空之间非线性相互作用的级联处理，我们考虑了产生的电场贡献，从而导致可检测到的背部动作。具体而言，我们从理论上讲了两个现实的设置，分别利用一个或两个探针梁与量子真空的非线性相互作用。背部动作开始严重污染的设置参数确定了测量的噪声曲线。由于在梁分离器上进入真空波动，因此在不同通道中两个传入的探针脉冲的射击噪声是不相关的。这会导致相关性中没有基础射击噪声，而由于非线性射击噪声增强而引起的进一步贡献仍然存在。最终，可以将量子场的电光抽样视为有效无反作用的状态。
The influence of measurement back action on electro-optic sampling of electromagnetic quantum fluctuations is investigated. Based on a cascaded treatment of the nonlinear interaction between a near-infrared coherent probe and the mid-infrared vacuum, we account for the generated electric-field contributions that lead to detectable back action. Specifically, we theoretically address two realistic setups, exploiting one or two probe beams for the nonlinear interaction with the quantum vacuum, respectively. The setup parameters at which back action starts to considerably contaminate the measured noise profiles are determined. Due to the vacuum fluctuations entering at the beam splitter, the shot noise of two incoming probe pulses in different channels is uncorrelated. This leads to the absence of the base-level shot noise in the correlation, while further contributions due to nonlinear shot-noise enhancement are still present. Ultimately, the regime in which electro-optic sampling of quantum fields can be considered as effectively back-action free is found.
