Young‐Wook Cho

User-independent optical path length compensation scheme with sub-ns timing resolution for 1xN quantum key distribution network system

2020 · arXiv (Cornell University)

Quantum key distribution (QKD) networks constitute promising solutions for secure communication. Beyond conventional point-to-point QKD, we developed 1xN QKD network systems with a sub-ns resolution optical path length compensation scheme. With a practical plug-and-play QKD …

Global triplewise information trade-off in quantum measurement

2021 · arXiv (Cornell University)

State disturbance by a quantum measurement is at the core of foundational quantum physics and constitutes a fundamental basis of secure quantum information processing. While quantifying an information-disturbance relation has been a long-standing problem, recently …