Measurement-device-independent quantum key distribution (MDI-QKD) is a promising path toward practical quantum communication, but current high-performance demonstrations come at prohibitive overhead and isolated environments. Here, we present a high-speed MDI-QKD system operating at an unprecedented repetition frequency of 2.5 GHz and verify its strong noise tolerance by incorporating the advantage distillation method. The secure key is efficiently generated under 425 kHz noise counts, which is 4 orders of magnitude higher than isolated systems. A secure key rate with a kbps level is achieved under 30 dB channel attenuation without bulky, resource-intensive detection devices. Our Letter establishes a complete practical solution for QKD deployment and resolves the persistent difficulty of realizing practical quantum secure networks with advanced security, a high key rate, environmental robustness, and physical compactness.
Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CV-QKD) offers a practical path to quantum-secured communication owing to its compatibility with existing optical fibre networks and use of mature security proofs. Achieving high secret key rates in real-time systems, however, re...
Adam Alderton, Amanda Weerasinghe, Muataz Alhussein et al.· npj Quantum Information· 0 citations
Integrated continuous-variable quantum key distribution (CV-QKD) systems based on photonic chips offer a promising avenue for establishing large-scale and low-cost global quantum networks. In such systems, the grating coupler (GC) serves as an interface for optical coupling, but its strongly wavelength-dependent effici...
Yi-Yu Mao, Yu-Hao Liu, Jing Li et al.· Optics Express· 0 citations
Quantum key distribution (QKD) offers an approach for secure communication over quantum channels, based on the principles of quantum mechanics. However, the inevitable imperfections in QKD systems can introduce critical vulnerabilities, posing significant challenges to the deployment of QKD in terms of both practical s...
Yi-Fei Lu, Yan-Yang Zhou, Yang Wang et al.· Physical Review A· 0 citations
Measurement-device-independent quantum key distribution (MDI-QKD) eliminates detector side-channel attacks by relocating all measurements to an untrusted intermediate node. However, its practical implementation critically relies on picosecond-level temporal synchronization between spatially separated users. In this wor...
Anton P. Pljonkin, A. Shelupanov· Algorithms· 0 citations
The technological development of QKD (Quantum Key Distribution) is accelerating from a research topic towards commercial deployment. QKD initiatives are increasingly addressing real-world use cases. Besides lots of literature on theory and lab-demos, first high Technology-Readiness Level systems are available. Due to t...
Pia Lutzen, Philipp Kleinpass, I. de Marco et al.· Quantum Communications and Q...· 0 citations
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