Daylight operation of a free space, entanglement-based quantum key distribution system

Details Daylight operation of a free space, entanglement-based quantum key distribution system Daylight operation of a free space, entanglement-based quantum key distribution system

2008-12-10

arxiv.org/abs/0812.1880v1

New J. Phys. 11 045007 (2009)

Physics

Quantum Physics

13 pages, 6 figures

Scientific paper

10.1088/1367-2630/11/4/045007

Many quantum key distribution (QKD) implementations using a free space transmission path are restricted to operation at night time in order to distinguish the signal photons used for a secure key establishment from background light. Here, we present a lean entanglement-based QKD system overcoming that imitation. By implementing spectral, spatial and temporal filtering techniques, we were able to establish a secure key continuously over several days under varying light and weather conditions.

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