Daylight operation of a free space, entanglement-based quantum key distribution system
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چکیده
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 limitation. 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. PACS numbers: 03.67.Dd, 42.79.Sz, 42.50.Ex Daylight operation of a free space, entanglement-based quantum key distribution system2
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تاریخ انتشار 2008