‘Spooky action at a distance’: Researchers dev…

Saarland, Germany (SPX) Jun 11, 2018

Communication using quantum states offers ultimate security, because eavesdropping attempts perturb the signal and would therefore not remain undetected. For the same reason, though, long-distance transmission of that information is difficult.

In classical telecommunication, the increasing attenuation of the signal is counteracted by measuring, amplifying and re-sending it in so-called rep
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