利用干涉单光子进行量子互补性的延迟选择测试。

Delayed-choice test of quantum complementarity with interfering single photons.

作者信息

Jacques Vincent, Wu E, Grosshans Frédéric, Treussart François, Grangier Philippe, Aspect Alain, Roch Jean-François

机构信息

Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan, UMR CNRS 8537, Cachan, France.

出版信息

Phys Rev Lett. 2008 Jun 6;100(22):220402. doi: 10.1103/PhysRevLett.100.220402. Epub 2008 Jun 3.

DOI:10.1103/PhysRevLett.100.220402

PMID:18643406

Abstract

We report an experimental test of quantum complementarity with single-photon pulses sent into a Mach-Zehnder interferometer with an output beam splitter of adjustable reflection coefficient R. In addition, the experiment is realized in Wheeler's delayed-choice regime. Each randomly set value of R allows us to observe interference with visibility V and to obtain incomplete which-path information characterized by the distinguishability parameter D. Measured values of V and D are found to fulfill the complementarity relation V2+D2 < or =1.

摘要

我们报告了一项关于量子互补性的实验测试，该测试使用单光子脉冲送入马赫-曾德尔干涉仪，干涉仪的输出分束器具有可调反射系数R。此外，该实验是在惠勒延迟选择模式下实现的。R的每个随机设定值都使我们能够观察到可见度为V的干涉，并获得由可区分性参数D表征的不完整路径信息。实验发现，V和D的测量值满足互补关系V2+D2≤1。