A Quantum Encryption Record in Optical Fiber

Optics and Photonics  November 16, 2018
An international team of researchers (Switzerland, USA – industry) has demonstrated a quantum key distribution system with a 2.5 GHz repetition rate using a three-state time-bin protocol combined with a one-decoy approach. Taking advantage of superconducting single-photon detectors optimized for quantum key distribution and ultralow-loss fiber, they can distribute secret keys at a maximum distance of 421 km and obtain secret key rates of 6.5 bps over 405 km. The research could ultimately enable cheaper and more practical systems that are a commercially viable alternative to conventional technology…read more. TECHNICAL ARTICLE¬†

Record Distance for Quantum Cryptography. Credit: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.190502

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