Encrypted communications that never eavesdropped Evolution of the development of quantum memories that hold the key to "quantum internet"

ByJah ~

Quantum computerTechnology to transfer quantum encrypted information "Quantum network(Quantum Internet) "is thought to be a communication technology with safety that can not be broken absolutely because it can not wiretapping, but it is extremely difficult to maintain and preserve photons that hold quantum bit information for a long time There was a big problem. In such a situation, Australian researchersQuantum entanglementWe succeeded in keeping photons in the state for 6 hours and are stepping up a big step in realizing quantum internet.

Optically addressable nuclear spins in a solid with a six-hour coherence time: Nature: Nature Publishing Group
http://www.nature.com/nature/journal/v517/n7533/full/nature14025.html

Quantum optical hard drive breakthrough - ScienceDaily
http://www.sciencedaily.com/releases/2015/01/150108100658.htm

The generation and transmission itself of quantum entangled photons used in quantum cryptography is relatively easy, but in order to move a long distance it is necessary to go through a relay point, whereas the quantum state is in a natural state, It was susceptible to impact, and it collapsed in just a few milliseconds, so it was very difficult to maintain the state holding information.

For this problem,Australian National University (ANU)Dr. Mangin Chung and others' research team stored quantum informationGround stateOf europium ions (151 Eu 3 +) in yttrium silicate (Y 2 SiO 5) crystals while keeping quantum entangled state for 6 hours and scientific journalsAnnounced at NatureDid.


Dr. Jung said that yttrium silicate crystals that succeeded in stably preserving quantum entangled photons are "like a portable" optical "hard disk that stores quantum entangled state information," and this time Regarding research results, "The ability to maintain quantum entangled state for a long time has the potential to revolutionize quantum information communication."


Once the quantum network technology is completed, a completely secure communication environment will not be allowed where eavesdropping is permitted, but against the cryptographic communication technology that can not be deciphered, the vigilance of the public authority side is considered to be strong It is. For example, a net censor system "Great Firewall"Of course, as long as the prime minister is re-elected as" China should not allow communication means that the government can not decipher, "not only China that introduces WhatsApp, SkypeBritish Prime Minister Cameron's motion to express the intention to submit a bill prohibiting encrypted communication applications and servicesIt is no wonder that there is a move to suppress quantum encryption technology even in developed countries that guarantee freedom of communication.