Quantum teleportation allows you to transfer information into a space that is inaccessible by any other means, without revealing or destroying it. The ideal medium for such a transfer are carbon atoms in diamond.
The carbon atoms in the nucleus contain six protons and six neutrons, surrounded by six rotating electrons. In diamond, they form a grid known for its durability. However, they may have complex defects, for example, when a nitrogen atom appears in one of two neighboring vacancies instead of a carbon atom. This defect is called a nitrogen-substituted vacancy or NV-center, writes Phys.org.
Surrounded by carbon atoms, the structure of the nucleus of a nitrogen atom creates what Japanese scientists call a nanomagnet.
In order to control the electron and carbon isotope in the vacancy, a team of specialists from Yokohama State University attached a quarter-quarter hair to the surface of the diamond. Then they applied a micro and radio wave to the wire in order to create oscillations of the magnetic field around the diamond. Scientists have tuned the shape of the microwave to obtain optimal conditions for the transfer of quantum information.
Then the researchers “zapped” the electron with a nanomagnet. With the help of micro and radio waves, they caused the electron spin to tangle with the spin of carbon. As soon as this happened, their physical characteristics were so intertwined that they could no longer be described separately, a photon containing quantum information was sent, and an electron absorbed it. The absorption made it possible to transfer the polarization state of the photon to carbon, controlled by an entangled electron. So there was a teleportation of information at the quantum level.
“The success of storing a photon in another node enhances the entanglement between two neighboring nodes,” said Professor Hideo Kosaka, the project manager. This process, which is called a quantum transponder, can transfer pieces of information from a node to a node. The ultimate goal of scientists is to create scalable quantum repeaters for long-range quantum communication and distributed quantum computers for serious computing.
Recently, American physicists have reported an important achievement – they managed to transfer quantum logic between two qubits of the beryllium ion, located at a distance of over 340 micrometers in separate zones of the ion trap.