Scientists passed the information to two kilometers using quantum communication
Scientists, I believe have been for decades looking for a way to transfer information, which would have been 100% safe and the information not lost and the signal came in full force, as it was sent. Development go about in all directions, something that so to say goes and there is already a concrete result.
Researchers from Stanford University announced Tuesday that managed to use quantum communication of electrons, to transmit information over a distance of 2 km This was the longest distance achieved so far for quantum communication experiment gives evidence that quantum computation and communication can be implemented in practice.
Quantum computers use physical phenomenon that Einstein once called "spooky action at a distance", in which two elementary particles as we interact and remain connected no matter the distance between them.
In this case, scientists have linked the quantum state of the spin of electrons, the analog of rotation around the axis, very small object. When two electrons are bound quantum communication, this means that when measuring the spin of one electron, the other he, too, will change independently, where the electron in the atom or thousands of light years from each other.
"Electronic spin is the basic unit in quantum computing," explains physicist Leo Yu in his statement on the subject. "The experiment can be continued in the future will cut through the way for new quantum networks that can facilitate reliable transmission of information around the world."
The problem with electrons is that they interact strongly with atoms because of the negative charge. It`s enough to quickly destroy the relationship between the two electrons, while the electron travels in the vacuum or the environment. To cope with this problem, the researchers used the photons, as "comrades" of electrons.
The process of connection of electrons and photons is called quantum correlated. In the experiment, the scientists were faced with another problem the photon spin often change when they fly in an optical fiber. And while the binding of electrons and of photons in pairs is quite a difficult task, preserving, splitting the photons during the trip, it turned out to be an even bigger problem.
Experimenting, scientists have solved this problem they created temporary markers some kind of reference points in space and time including the spin of particles and ensured the arrival of the photons with the same spin with which they were launched.
Using these techniques, scientists have linked quantum communication two electrons, and divided by the distance 2 kilometers fiber optic. Scientific work published in Nature Communications.
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