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arXiv 2104.02641quant-phphysics.optics
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量子光学相干:从线性到非线性干涉仪

Quantum optical coherence: From linear to nonlinear interferometers

K. -H. Luo, M. Santandrea, M. Stefszky, J. Sperling, M. Massaro, A. Ferreri, P. R. Sharapova, H. Herrmann, C. Silberhorn

摘要:

干涉仪提供了一种高灵敏度的手段来研究和利用光在计量应用中的相干特性。然而,干涉仪有各种形式,并利用内部光学状态的不同特性。在本文中,我们介绍了一个分类方案,其特征的基础上所涉及的非线性元件的数量的任何干涉仪,通过研究它们对单光子和光子对状态的影响。具体的干涉仪从这些更一般的类的几个例子进行了讨论,并描述了预期的单光子和单光子对输入状态的一阶和二阶相干测量的理论进行了总结和比较。这些理论预测,然后在一个创新的实验装置,是很容易能够实现之间的切换,只有一个或两个非线性元件组成的干涉仪进行测试。在这两种配置中测量所得到的单打和符合率,结果被认为是很好地符合所提出的理论。相干性的测量结果与所提出的分类方案相关联,表明我们的实验设计可以用于深入了解包含不同非线性程度的各种干涉仪设置的特性。

英文摘要:

Interferometers provide a highly sensitive means to investigate and exploit the coherence properties of light in metrology applications. However, interferometers come in various forms and exploit different properties of the optical states within. In this paper, we introduce a classification scheme that characterizes any interferometer based on the number of involved nonlinear elements by studying their influence on single-photon and photon-pair states. Several examples of specific interferometers from these more general classes are discussed, and the theory describing the expected first-order and second-order coherence measurements for single-photon and single-photon-pair input states is summarized and compared. These theoretical predictions are then tested in an innovative experimental setup that is easily able to switch between implementing an interferometer consisting of only one or two nonlinear elements. The resulting singles and coincidence rates are measured in both configurations and the results are seen to fit well with the presented theory. The measured results of coherence are tied back to the presented classification scheme, revealing that our experimental design can be useful in gaining insight into the properties of the various interferometeric setups containing different degrees of nonlinearity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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