Bipolar communication possible with a single quantum particle

Bipolar communication possible with a single quantum particle as utilizing a single photon or a particle of light, the information can be transmitted between two people. The achievement depends on a vagary of quantum mechanics – superposition, the occurrence by which particles can efficiently engage two places at once.

Transmitting data through quantum particles is a favored research subject, because of the commitment of unhackable quantum communication. The recent studies identify a formerly anonymous convolution on that type of technique. University of Vienna experimental physicist Philip Walther says that sometimes you do not observe an idea which is right in front of you all this time.

Theoretical physicists Flavio Del Santo of the University of Vienna and Borivoje Dakić from the Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences elucidate with an example, consider that that two people, Alice and Bob, are positioned some distance away from each other. In the classic physics both will require a photon to send each other the message, with each light particle transmitting a single bit, 0 or 1. However, if both Bob and Alice have a photon which is in a superposition, concurrently situated near Alice and near Bob, both of them can control that photon to encode a 0 or 1, and then send it back to the other.

How each controls the photon regulates which of two accepts the photon in the end. If Alice and Bob put in the same bit — both 0s and both 1s — Alice receives the photon. If their bits don’t match, Bob gets it. Since Alice knows whether she sent a 0 or a 1, she immediately knows whether Bob encoded a 0 or 1, and vice versa.

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