Quantum key distribution in a packet-switched network

• URL: http://arxiv.org/abs/2302.14005v1
• Date: Mon, 27 Feb 2023 17:48:17 GMT
• Title: Quantum key distribution in a packet-switched network
• Authors: Reem Mandil, Stephen DiAdamo, Bing Qi, Alireza Shabani
• Abstract summary: We outline a three-step approach for key rate optimization in a packet-switched network. Our simulated results show that practical key rates may be achieved in a sixteen-user network with no optical storage capacity. We find that implementing cut-off storage times in a strategy analogous to real-time selection in free-space QKD can significantly enhance performance.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Packet switching revolutionized the Internet by allowing the efficient use of network resources for data transmission. In a previous work, we introduced packet switching in quantum networks as a path to the Quantum Internet and presented a proof-of-concept for its application to quantum key distribution (QKD). In this paper, we outline a three-step approach for key rate optimization in a packet-switched network. Our simulated results show that practical key rates may be achieved in a sixteen-user network with no optical storage capacity. Under certain network conditions, we may improve the key rate by using an ultra-low-loss fiber delay line to store packets during network delays. We also find that implementing cut-off storage times in a strategy analogous to real-time selection in free-space QKD can significantly enhance performance. Our work demonstrates that packet switching is imminently suitable as a platform for QKD, an important step towards developing large-scale and integrated quantum networks.

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