Demonstration of a switched CV-QKD network

EPJ Quantum Technology

Research

Laura Ortiz¹  Rubén B. Méndez¹  Juan P. Brito¹  Vicente Martín¹  Momtchil Peev²  Hans H. Brunner²  Chi-Hang Fred Fung²  Felipe Jiménez³  José M. Rivas-Moscoso³  Diego R. López³  Antonio A. Pastor³ 

[1] Center for Computational Simulation, Universidad Politécnica de Madrid, Madrid, Spain;Munich Research Center, Huawei Technologies Duesseldorf GmbH, Munich, Germany;Telefónica gCTIO/I+D, Madrid, Spain;

关键词: QKD;    CV-QKD;    Quantum cryptography;    Quantum communications;    Quantum networks;   

DOI  :  10.1140/epjqt/s40507-023-00194-x

 received in 2023-06-13, accepted in 2023-09-07,  发布年份 2023

来源: Springer

【 摘 要 】

A quantum channel is a physical media able to carry quantum signals. Quantum key distribution (QKD) requires direct quantum channels between every pair of prepare-and-measure modules. This requirement heavily compromises the scalability of networks of directly connected QKD modules. A way to avoid this problem is to introduce switches that can dynamically reconfigure the set of connections. The reconfiguration of a quantum channel implies that the modules using it can adapt to the new channel and peer.The maturity and flexibility of continuous-variable QKD (CV-QKD) qualifies it as a strong contender for integration into optical communication networks. Here we present the implementation of a switched CV-QKD network embedded in the Madrid quantum testbed. The optical switching of the quantum paths significantly reduces the amount of required QKD modules and facilitates the scalability of the network. This demonstration highlights the flexibility and ease of integration of this emerging technology.

【 授权许可】

CC BY   
© Springer-Verlag GmbH Germany, part of Springer Nature 2023

【 图 表 】

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