Quantum teleportation, a means of transferring the identity of one particle to another over some distance, made its debut in Physical Review Letters in 1993.
Quantum teleportation is a technique for transferring quantum information from a sender at one location to a receiver some distance away. While teleportation is commonly portrayed in science fiction as a means to transfer physical objects from one location to the next, quantum teleportation only transfers quantum information. In July, the US Department of Energy unveiled a blueprint for the first quantum internet, connecting several of its National Laboratories across the country. A quantum internet would be able to transmit large volumes of data across immense distances at a rate that exceeds the speed of light. Traditional computer data is coded in either zeros or ones. Quantum information is superimposed in both zeros and ones simultaneously. Academics, researchers and IT professionals will need to create devices for the infrastructure of quantum internet including: quantum routers, repeaters, gateways, hubs, and other quantum tools.
Quantum teleportation, because of the word t eleportation , may seem to bring us to the edge of science fiction. But not so fast. Quantum teleportation refers to the use of a quantum entanglement apparatus with its entangled photon pair source, its two detection stages, plus additional necessary optics, to transport a quantum state from one site to another site. This is done via the use of quantum entanglement probability amplitudes and with the help of a classical transmission of a unitary transformation . A unitary transformation is a mathematical matrix that takes the form of https://www.w3.org/1998/Math/MathML" display="inline"> I , σ x , σ z , or i σ y , where I is the identity matrix and the Greek characters refer to the Pauli matrices.
Abstract One interesting application of entanglement is quantum teleportation, which is a technique for transferring an unknown quantum state from one place to another. In science fiction, teleportation generally involves a machine scanning a person and another machine reassembling the person on the other end. The original body disintegrates and no longer exists. Similarly, quantum teleportation works by “scanning” the original qubit, sending a recipe, and reconstructing the qubit elsewhere. The original qubit is not physically destroyed in the science fiction sense, but it is no longer in the same state. Otherwise, the previously mentioned no-cloning theorem—which states that a qubit cannot be exactly copied onto another qubit—would be violated.1 As we will see, the “scanning” part poses a problem which can only be solved by leveraging quantum entanglement.