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Counterfactuality of “counterfactual” communication

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Abstract

The counterfactuality of recently proposed protocols for direct quantum communication is analyzed. It is argued that the protocols can be counterfactual only for one value of transmitted bit. The protocols achieve reduced probability of detection of the particle in the transmission channel by increasing the number of paths in the channel, but not below the probability of detecting of a particle actually passing through such multi-path channel.

© 2014 Optical Society of America

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