Spectral Hong–Ou–Mandel Interference between Independently Generated Single Photons for Scalable Frequency‐Domain Quantum Processing,Laser & Photonics Reviews

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Spectral Hong–Ou–Mandel Interference between Independently Generated Single Photons for Scalable Frequency‐Domain Quantum Processing
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-03-18 , DOI: 10.1002/lpor.202000464
Anahita Khodadad Kashi _{1,

2,

3} , Michael Kues _{1,

2,

3}

Affiliation

The photon's frequency degree of freedom, being compatible with mature telecom infrastructure, offers large potential for the stable and controllable realization of photonic quantum processing applications such as the quantum internet. The Hong–Ou–Mandel effect, as a two‐photon interference phenomenon, serves as a central building block for such frameworks. A key element yet missing to enable meaningful frequency‐based implementations as well as scalability in the number of processed photons, is the demonstration of the Hong–Ou–Mandel effect between independently created photons of different frequencies. The experimental implementation of bosonic and fermionic frequency domain Hong–Ou–Mandel interference between independently generated single photons is reported here, with measured visibilities of 74.31% ± 3.56% and 86.44% ± 8.27%, respectively. This is achieved through a scalable photonic frequency circuit that creates two post‐selected pure single photons, which undergo frequency mixing at an electro‐optic phase modulator. The system is on‐the‐fly reconfigurable allowing to probe bosonic and fermionic Hong–Ou–Mandel interference in the same experimental setup. The work demonstrates the versatility of frequency domain processing and its scalability toward higher photon numbers, which enables new quantum gate concepts as well as the establishment of frequency‐based large‐scale quantum networks.

中文翻译：

独立生成的单个光子之间的可扩展频域量子处理的光谱洪-欧-曼德尔干涉

光子的频率自由度与成熟的电信基础设施兼容，为诸如量子互联网之类的光子量子处理应用的稳定和可控实现提供了巨大的潜力。Hong-Ou-Mandel效应是一种双光子干涉现象，是此类框架的主要组成部分。尚无法实现有意义的基于频率的实现以及已处理光子数量的可伸缩性的一个关键要素是，在独立创建的不同频率的光子之间的Hong-Ou-Mandel效应的演示。此处报道了独立产生的单个光子之间的硼和铁离子频域Hong–Ou–Mandel干涉的实验实现，测得的可见度分别为74.31％±3.56％和86.44％±8.27％，分别。这是通过可扩展的光子频率电路实现的，该电路创建两个后选的纯单光子，并在电光相位调制器处进行频率混合。该系统是可即时配置的，可以在同一实验设置中探测到硼离子和铁离子的Hong-Ou-Mandel干扰。这项工作展示了频域处理的多功能性及其对更高光子数的可扩展性，从而实现了新的量子门概念以及基于频率的大规模量子网络的建立。该系统是可即时配置的，可以在同一实验设置中探测到硼离子和铁离子的Hong-Ou-Mandel干扰。这项工作展示了频域处理的多功能性及其对更高光子数的可扩展性，从而实现了新的量子门概念以及基于频率的大规模量子网络的建立。该系统是可即时配置的，可以在同一实验设置中探测到硼离子和铁离子的Hong-Ou-Mandel干扰。这项工作展示了频域处理的多功能性及其对更高光子数的可扩展性，从而实现了新的量子门概念以及基于频率的大规模量子网络的建立。

更新日期：2021-05-07

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