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Author

Yonggi Jo

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Preprint Jul 2026

Quantum key distribution over a 2 km free-space channel with a high secure key rate

Free-space quantum key distribution (QKD) provides crucial advantages, including mobility and deployment flexibility, for securing next-generation communication networks. However, practical free-space implementations face major challenges, such as muilti-photon vulnerabilities, spatial mode mismatch, and atmospheric tu...

Kyungdeuk Park, Dongkyu Kim, Dong-Gil Im et al. · 0 citations
Preprint Jul 2026

Maximal coherence of quantum measurement and the resource theory of sharpness

A resource theory of quantum measurement can be addressed in terms of quantum coherence and measurement sharpness, respectively. The former analyzes the off-diagonal structure of POVM elements in a predetermined basis while the latter analyzes the deviation from trivial, state-independent, measurements. We establish a...

Kyunghyun Baek, Yonggi Jo, H. Nha · 0 citations

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