2021
DOI: 10.1038/s41598-021-88468-1
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Abstract: We present an experimental demonstration of the feasibility of the first 20 + Mb/s Gaussian modulated coherent state continuous variable quantum key distribution system with a locally generated local oscillator at the receiver (LLO-CVQKD). To increase the signal repetition rate, and hence the potential secure key rate, we equip our system with high-performance, wideband devices and design the components to support high repetition rate operation. We have successfully trialed the signal repetition rate as high a… Show more

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Cited by 35 publications
(16 citation statements)
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“…Concurrently, the ability to experimentally access quantum signatures has expanded considerably, allowing for test-of-principle verification for single [13][14][15] or collective [7,16,17] quantum systems. Examples of experimental platforms for this purpose are quantum optical devices and trapped ions systems, where it is possible to work with continuous or discrete variables [18,19]. In both of them, quantum coherence has played a fundamental role.…”
Section: Introductionmentioning
confidence: 99%
“…Concurrently, the ability to experimentally access quantum signatures has expanded considerably, allowing for test-of-principle verification for single [13][14][15] or collective [7,16,17] quantum systems. Examples of experimental platforms for this purpose are quantum optical devices and trapped ions systems, where it is possible to work with continuous or discrete variables [18,19]. In both of them, quantum coherence has played a fundamental role.…”
Section: Introductionmentioning
confidence: 99%
“…Quantum key distribution (QKD) is a secure cryptographic key exchange between two remote authenticated participants, Alice and Bob, over an insecure quantum channel [1,2]. This scheme uses quantum mechanics laws to decode the quantum states of light.…”
Section: Introductionmentioning
confidence: 99%
“…A system that uses single-dimension detection of the quantum signal is known as discrete-variable QKD (DV-QKD), while a multiple-dimension detection is known as continuous-variable QKD (CV-QKD). CV-QKD provides a relatively higher noise-resilient and cost-effective solution to support higher key rates for limited distances [1]. However, coherent detection of CV-QKD signals at Bob requires Bob's awareness about Alice's local oscillator (LO).…”
Section: Introductionmentioning
confidence: 99%
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“…To date, numerous sub-protocols have been derived from the GG02 protocol [ 4 ], and their security has been theoretically demonstrated [ 5 , 6 ]. In addition, experimental investigations have also demonstrated the feasibility of the designed scheme [ 7 , 8 , 9 ]. However, there are still obstacles that restrict the implementation of the practical CVQKD system [ 10 , 11 ].…”
Section: Introductionmentioning
confidence: 99%