论文标题
通过使用多阶段的非线性干涉仪来设计光子对的光谱曲线
Engineering the spectral profile of photon pairs by using multi-stage nonlinear interferometers
论文作者
论文摘要
使用N级非线性干涉仪（NLI）中光子对的量子干扰，可以将关节光谱函数的轮廓修改为岛屿模式。我们执行两种实验。一个是脉冲泵送NLI中的所有非线性纤维都是相同的。另一个是非线性纤维的长度不同。我们不仅说明光谱函数的模式如何随阶段数n变化，而且还表征了岛峰的相对强度与n的相对强度如何变化。结果，与参考文献中的理论预测非常吻合。 [1]，揭示了二项式分布后NLI非线性纤维的NLI可以提供更好的活动过滤函数。我们的研究表明，多阶段NLI的主动滤波效果是有效地设计可分解的两光子状态的有用工具 - 量子信息处理的理想资源。
Using the quantum interference of photon pairs in N-stage nonlinear interferometers (NLI), the contour of joint spectral function can be modified into islands pattern. We perform two series of experiments. One is that all the nonlinear fibers in pulse pumped NLI are identical; the other is that the lengths of N pieces nonlinear fibers are different. We not only demonstrate how the pattern of spectral function changes with the stage number N, but also characterize how the relative intensity of island peaks varies with N. The results, well agree with theoretical predictions in Ref. [1], reveal that the NLI with N pieces nonlinear fibers following binomial distribution can provide a better active filtering function. Our investigation shows that the active filtering effect of multi-stage NLI is a useful tool for efficiently engineering the factorable two-photon state - a desirable resource for quantum information processing.
