We report on a complete free-space field implementation of a modified Ekert91 protocol for quantum key distribution using entangled photon pairs. For each photon pair we perform a random choice between key generation and a Bell inequality. The amount of violation is used to determine the possible knowledge of an eavesdropper to ensure security of the distributed final key.
@article{arxiv.0805.3629,
title = {Experimental quantum key distribution based on a Bell test},
author = {Alexander Ling and Matthew P. Peloso and Ivan Marcikic and Valerio Scarani and Antia Lamas-Linares and Christian Kurtsiefer},
journal= {arXiv preprint arXiv:0805.3629},
year = {2008}
}
Comments
5 pages ReVTeX, 3 figures; version v2 with updated references and minor corrections, author spelling fixed