Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524

Article

Published online February 15, 2022     https://doi.org/10.1007/s40042-021-00342-5

Copyright © The Korean Physical Society.

Long‑range distribution of high‑quality time‑bin entangled photons
for quantum communication

Jin‑Hun Kim, Jin‑Woo Chae, Youn‑Chang Jeong, Yoon‑Ho Kim

J. Korean Phys. Soc. 80(3), 203 - 213 (2022)

Abstract

Distributing entangled states to remote users via widely distributed fiber networks has been a difficult task, especially in a high-quality manner. we present an experimental distribution of high-quality entangled qubits over long-distance fiber channels, utilizing time-bin mode in particular because to its exceptional robustness in fiber-optic distributions. We demonstrate that time-bin entanglement can be reliably shared between two distant parties separated by up to 60 kilometers in all fiber-based implementations, and showing the significance of our study in long-range, long-lasting quantum communication.