Harder G, Ansari V, Bartley T J, Brecht B, Silberhorn C
Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany
Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany.
Philos Trans A Math Phys Eng Sci. 2017 Aug 6;375(2099). doi: 10.1098/rsta.2016.0244.
In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process.This article is part of the themed issue 'Quantum technology for the 21st century'.
在过去几十年里，低损耗波导、高效光子数探测器和非线性过程取得了很大进展。工程和频转换目前已发展到能够在任意时间宽带模式下运行的阶段，从而使光谱自由度可用于信息编码。在此，信息通常被编码到单个光子的时间模式中。在这里，我们基于集成光学器件分析了在不同时间模式下使用多光子态或压缩态的前景。我们描述了模式选择性和频转换与空间分束器网络之间的类比。此外，我们分析了当前技术在波导中可实现的压缩极限以及转换过程中的损耗极限。本文是“21世纪量子技术”主题特刊的一部分。
