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11 January 2023 Experimental demonstration of practical high-speed Gaussian coherent state continuous variable quantum key distribution with real-time parameter monitoring and key distillation
Amanda Weerasinghe, Muataz Alhussein, He Li, Adrian Wonfor, Richard Penty
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Proceedings Volume 12335, Quantum Technology: Driving Commercialisation of an Enabling Science III; 123350G (2023) https://doi.org/10.1117/12.2644948
Event: SPIE Photonex, 2022, Birmingham, United Kingdom
Abstract
Gaussian modulated coherent state continuous variable quantum key distribution protocol is proven to provide high security while being compatible with classical coherent communication equipment. Here, we demonstrate a high-speed Gaussian modulated coherent state continuous variable quantum key distribution with a symbol rate of 40 MHz. Our system is consisted of field deployable data acquisition and processing hardware. We have also developed a software tool chain for recording data and parameter monitoring in real time. The data is then post processed to distill secret keys. We have achieved a secret key rate of 2.3 Mbps after all the post processing stages, at a transmission distance of 25 km.
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Amanda Weerasinghe, Muataz Alhussein, He Li, Adrian Wonfor, and Richard Penty "Experimental demonstration of practical high-speed Gaussian coherent state continuous variable quantum key distribution with real-time parameter monitoring and key distillation", Proc. SPIE 12335, Quantum Technology: Driving Commercialisation of an Enabling Science III, 123350G (11 January 2023); https://doi.org/10.1117/12.2644948
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KEYWORDS
Quantum key distribution
Signal detection
Signal processing
Software development
Telecommunications
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