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Quantum teleportation over urban fiber

01.10.2016

Two research teams, one from China and one from Canada, have independently managed to carry out the first quantum teleportation in history not in a laboratory, but over ordinary urban fiber optic communication systems.

Theoretically, the possibility of quantum teleportation was predicted by physicists in 1993. The essence of this phenomenon is that the so-called entangled particles can exchange information about their own state at a distance, thus, as if instantly moving from place to place. In recent years, experiments have been actively carried out that have shown that this is a reality, with each time the teleportation range is growing. But all of them were carried out in laboratories, in conditions far from real, because of which there was criticism about the inapplicability of the technology in an applied way. Now scientists have managed to carry out the first quantum teleportation over a fiber optic network, so far at a distance of 6 and 7 kilometers.

The technology used by the Chinese and Canadian scientists is somewhat different from that used in earlier experiments. There are usually two parties involved in the procedure, physicists call them Alice and Bob. Now another "character" has been added to this scheme, he received the name Charlie. In fact, this is a transmission link in the future quantum computer network, scientists explain.

Directly in the experiments, Chinese scientists teleported qubits. Their result will be applicable to the creation of quantum computers. Canadian researchers have been working with pairs of photons, their promising task is the development of new quantum encryption systems.

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