The Chinese Academy of Sciences (CAS) reports that physicists from China and Austria have succeeded in conducting an intercontinental teleportation of particles using the Mozi quantum communications satellite and made a conference call which is impossible to hack.
As CAS writes on their website, “the first quantum-safe video conference was held between President BAI Chunli of the Chinese Academy of Sciences in Beijing and President Anton Zeilinger of the Austria Academy of Sciences in Vienna, as the first real-world demonstration of intercontinental quantum communication on September 29th.”
This is a huge step forward in the field of quantum communication which unlike the traditional public key cryptography, which “relies on the perceived computational intractability of certain mathematical functions,” it uses “individual light quanta (single photon) in quantum superposition states.”
The scientists explain that this achievement, compared to fiber optic systems, improves the quality of communication by 20 times.
They have achieved this by combining quantum communication satellite channels with the existing terrestrial quantum network which connects Shanghai, Beijing, and several other Chinese cities.
This makes China the first country to build a space-ground integrated quantum communication network, and establish an intercontinental quantum video conference with Austria.
As the Chinese Academy of Sciences explains, “private and secure communications are fundamental human needs. In particular, with the exponential growth of Internet use and e-commerce, it is of paramount importance to establish a secure network with global protection of data.”
Quantum technologies are based on the principle of quantum entanglement. The properties of quantum entanglement were first predicted in 1935 by Einstein, Rosen, and Podolsky, in the formulation of the so-called EPR paradox.
Quantum entanglement occurs when pairs or groups of particles are in the same quantum state regardless the physical distance, making the particles act like they are connected by an invisible force.
This means that no matter the distance in communication, the communication will be based on light particles that cannot be ‘cloned.’ This is why the quantum communication systems are impenetrable from hackers and espionage.
Source: Chinese Academy of Sciences
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