Abstract
The distribution of entanglement in telecommunication networks is of central importance for quantum communication protocols, such as teleportation and entanglement swapping, as well as for establishing device-independent security in such networks. When photon pair generation based on spontaneous parametric down conversion in PPLN crystals is used for this purpose, the large emission bandwidth and the frequency correlation between the two photons enable the use of demultiplexers to distribute correlated photons to a large number of user pairs [1,2,3]. Clearly, the characteristics of these devices need to allow the preservation of the quantum correlations throughout the network [1,4]. Here, we experimentally demonstrate entanglement distribution between multiple channel pairs using two commercial demultiplexers based on diffraction grating technology.
© 2015 IEEE
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