A new alphabet to write and read quantum messages with very fast particles

Phys.org  September 2, 2019
If the quantum particle is relativistic it is impossible for standard techniques to decode the message unambiguously, and the communication therefore fails. Researchers in Austria deliver a new definition of the spin of quantum particles that move very quickly. It modifies both the way Anna writes the message and the way Bill reads it. Key to this technique is a “translation” of the way the message would be written and read between the standard alphabet used when the electron is at rest, and the new alphabet used when the electron travels very fast. These results indicate that this translation procedure could open new applications in relativistic quantum information and the technique could be helpful in satellite-based quantum communication…read more. TECHNICAL ARTICLE

If they use a new definition of the spin of the electron (pictured as the modified alphabet) the message is read out correctly, and they are able to use the electron to communicate. Credit: Flaminia Giacomini

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