A photon is sent to a nitrogen atom in the middle of carbon atoms forming a diamond. That was what a team of researchers at the National University of Yokohama in Japan managed to teleport quantum information and store it within the boundaries of this gem.
"Quantum teleportation enables the transfer of quantum information to a space that is otherwise inaccessible" explains Hideo Kosaka, professor of technology at the Japanese Study House and author of the study published in communication physics.
– [¿Es cierto que un año humano equivale a siete de un perro? Esto dice la ciencia]
"It also allows the transmission of information to a quantum memory without revealing or destroying stored quantum information," added .
It turns out that one of the principles of quantum science is to perform processes where the researcher does not know the mechanism during its development, but only its results. Therefore, this performance can be classified as one of great importance for the development of the transfer of encrypted information.
In this case, it was possible to reach an inaccessible point in another way. There is a space between the carbon atoms in a diamond. A carbon atom has six protons and six neutrons in its nucleus, surrounded by six rotating electrons. However, diamonds can have complex defects when there is a nitrogen atom in one of the two adjacent vacant positions where the carbon atoms should be. This defect is called the nitrogen search center.
Surrounded by carbon atoms, the core structure of the nitrogen atom creates what Kosaka calls a nanomagnet.
With a cable of a quarter of the width of the human being, the applied microwaves and a radio wave to build an oscillating magnetic field around the diamond, then with the nanomagnet, a nitrogen electron was anchored which, through special processes, became susceptible to entanglement. That was when the researchers decided to send photos with quantum information.
"The success of photon storage in the second node establishes interactions between two adjacent nodes," said Kosaka. Called quantum repeater, the process can carry individual bits of information from node to node through the quantum field.
"Our ultimate goal is to achieve scalable quantum repeaters for remote quantum communication and distributed quantum computers for large quantum computer, scale and metrology" said Kosaka.
With information from:
Emol – Chile