Phys.org July 3, 2024 Quantum key distribution (QKD) enables secure communication. Semiconductor quantum dots (QDs) are a promising building block for quantum communication applications because of the deterministic emission of single photons with high brightness and low multiphoton contribution. Researchers in Germany reported on the first intercity QKD experiment using a bright deterministic single photon source. A BB84 [one time pad encryption] protocol based on polarisation encoding was realized using the high-rate single photons in the telecommunication C-band emitted from a semiconductor QD embedded in a circular Bragg grating structure. Utilizing the 79 km long link (equivalent to 130 km for the […]
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Researchers achieve quantum key distribution for cybersecurity in novel experiment
Phys.org March 13, 2024 In their conference paper researchers at Oak Ridge National Laboratory reported on the first implementation of their CV-QKD scheme over a deployed optical fiber network. According to the researchers, in continuous variable quantum key distribution (CV-QKD), using a truly local (not transmitted over the network) oscillator improves security… read more. TECHNICAL ARTICLE