Daylight quantum key distribution over 1.6 km

Abstract

Quantum key distribution (QKD) has been demonstrated over a point-to-point $\sim 1.6$-km atmospheric optical path in full daylight. This record transmission distance brings QKD a step closer to surface-to-satellite and other long-distance applications.

4 pages, 2 figures, 1 table. Submitted to PRL on 14 January 2000 for publication consideration