Scientists from the EU have created a quantum communication channel that will not be able to break neither China nor Russia

Quantum key distribution (KRK) is a safe exchange of encryption between two sides. This approach uses the principles of quantum mechanics to generate random keys that cannot be broken even with quantum computers. KRK uses single photons as quantum keys. Any attempt to intercept the message leads to errors in the signal, which leads to its immediate detection. However, restrictions on existing quantum light sources complicate the creation of large networks using KRK, despite constant optimization.

The research group turned to semiconductor quantum points as sources of single photons. This approach helped them to achieve high speed of safe transfer of key to 79 km between Hannoir and Braunshweig. "We work with quantum points that are tiny structures similar to atoms, but adapted to our needs," the developers explained. - "For the first time we used these" artificial atoms "in a quantum experiment between two different cities.

This installation, known as the" quantum bond of the lower saxony "connects Hanover and Braunschweig with optical fiber. " KRK uses quantum light characteristics to guarantee the safety of interception messages. Quantum points emit single photons, the polarization of which researchers control and send to Braunshweig. A comparative analysis of the new KRK method with available, including one -photon sources, shows that it exceeds them.

Scientists are convinced that a good future is waiting for the quantum. In addition to ensuring safe communication, quantum points also open the potential for quantum repetitions and distributed quantum sensing. They allow you to store quantum information and can radiate photon clusters. These capabilities promise smooth integration of semiconductor one -electoral sources into large -scale and powerful quantum networks.

"A few years ago, we just dreamed of using quantum points in real quantum scenarios. Today we are glad to demonstrate their potential for many interesting experiments and applications in the future, moving to the quantum Internet," the researchers added. Earlier, we reported how quantum batteries work and when they can feed gadgets.