Distribution of GHz Sequential Time-Bin Entanglement in a Metropolitan Fiber Network

IF 4.3 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal of Selected Topics in Quantum Electronics Pub Date : 2025-02-06 DOI:10.1109/JSTQE.2025.3539921

Martin Achleitner;Alessandro Trenti;Philip Walther;Hannes Huebel

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引用次数: 0

Abstract

Efficient generation and high-quality distribution of entanglement is becoming increasingly more relevant in the field of quantum technologies, with important applications such as multiparty computation as well as quantum key distribution (QKD) on the rise. Quantum communication protocols based on entanglement offer an inherent quantum based randomness for key generation and provide in general higher security compared to prepare and measure implementations. Moreover, the future quantum internet will also be based on the distribution of entanglement for securely connecting quantum computers in a network. In this work we show the feasibility of using sequential time-bin entangled states for quantum key distribution in metropolitan networks using off-the-shelf components. The time-bin encoding ensures high fidelity distribution robust against random polarisation fluctuations occuring in optical fibers. Modulated laser pulses in the GHz frequency range are used to generate time-bin entangled photon pairs. The entangled photons are then sent over an about 30 km long (9.5 dB loss) fiber link within the Vienna fiber network, showing high degree of distributed entanglement with a measured 93% quantum visibility.

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城域光纤网络中GHz顺序时间盒纠缠的分布

随着多方计算和量子密钥分发（QKD）等重要应用的兴起，高效产生和高质量的纠缠分布在量子技术领域变得越来越重要。基于纠缠的量子通信协议为密钥生成提供了固有的基于量子的随机性，并且与准备和测量实现相比，通常提供更高的安全性。此外，未来的量子互联网也将基于量子纠缠的分布来安全连接网络中的量子计算机。在这项工作中，我们展示了在使用现成组件的城域网络中使用顺序时间盒纠缠态进行量子密钥分发的可行性。时间盒编码保证了高保真度分布对光纤中随机极化波动的鲁棒性。利用GHz频率范围内的调制激光脉冲产生时间bin纠缠光子对。然后，纠缠的光子通过维也纳光纤网络内约30公里长（9.5 dB损耗）的光纤链路发送，显示出高度的分布式纠缠，测量到的量子可见性为93%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Selected Topics in Quantum Electronics 工程技术-工程：电子与电气

CiteScore

10.60

自引率

2.00%

发文量

212

审稿时长

3 months

期刊介绍： Papers published in the IEEE Journal of Selected Topics in Quantum Electronics fall within the broad field of science and technology of quantum electronics of a device, subsystem, or system-oriented nature. Each issue is devoted to a specific topic within this broad spectrum. Announcements of the topical areas planned for future issues, along with deadlines for receipt of manuscripts, are published in this Journal and in the IEEE Journal of Quantum Electronics. Generally, the scope of manuscripts appropriate to this Journal is the same as that for the IEEE Journal of Quantum Electronics. Manuscripts are published that report original theoretical and/or experimental research results that advance the scientific and technological base of quantum electronics devices, systems, or applications. The Journal is dedicated toward publishing research results that advance the state of the art or add to the understanding of the generation, amplification, modulation, detection, waveguiding, or propagation characteristics of coherent electromagnetic radiation having sub-millimeter and shorter wavelengths. In order to be suitable for publication in this Journal, the content of manuscripts concerned with subject-related research must have a potential impact on advancing the technological base of quantum electronic devices, systems, and/or applications. Potential authors of subject-related research have the responsibility of pointing out this potential impact. System-oriented manuscripts must be concerned with systems that perform a function previously unavailable or that outperform previously established systems that did not use quantum electronic components or concepts. Tutorial and review papers are by invitation only.