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I recently came across the article The Quantum Internet Is Emerging, One Experiment at a Time in Scientific American where it was discussed how quantum networks could provide a level of privacy and security impossible to achieve with classical networks.

To quote from the article:

Although a fully realized quantum network is still a far-off vision, recent breakthroughs in transmitting, storing and manipulating quantum information have convinced some physicists that a simple proof of principle is imminent.

I am interested to know about the present state of research on quantum networking. Also, what the author of the article means by "a simple proof of principle."

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The last thing I heard about quantum communications can be seen in this link. Basically, they're taking rare earth ions that can make stable, interference-resistant qubits that can travel far distances without its quantum state being modified.

This "breakthrough" in addition to the first chip-to-chip quantum teleportation performed in december, 2019 may lead to new discoveries in this matter. You can check this one out via this link.

By "a simple proof of principle" I think the author means that by little experiments you can sometimes have a hint of what physical principle can be exploited to achieve a certain goal. In this context, this means that these various experiments in manipulating and transmitting qubits can be escaled up to build a global network. I guess we'll see.

I hope this answers your question.

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  • $\begingroup$ Thank you for sharing the links. $\endgroup$
    – Richard
    Jun 10, 2020 at 10:57

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