Quantum teleportation, or entanglement-assisted teleportation, is a process by which a qubit (the basic unit of quantum information) can be transmitted exactly (in principle) from one location to another, without the qubit being transmitted through the intervening space. It is useful for quantum information processing. However, it does not immediately transmit classical information, and therefore cannot be used for communication at superluminal (faster than light) speed. Quantum teleportation is unrelated to the common term teleportation – it does not transport the system itself, and does not concern rearranging particles to copy the form of an object.
The seminal paper first expounding the idea was published by C. H. Bennett, G. Brassard, C. Crépeau, R. Jozsa, A. Peres and W. K. Wootters in 1993. In November 2012, the first quantum teleportation from one macroscopic object to another was reported.
Presently, the record distance for quantum teleportation is 143 km (89 mi).
Read more about Quantum Teleportation: Protocol, Experimental Results, Motivation, A Summary, The Result, Entanglement Swapping, N-state Particles
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