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Realization of four-level qudits using biphotons

E V Moreva1, G A Maslennikov, S S Straupe

  • 1Moscow Engineering Physics Institute, State University, Russia. ekaterina.moreva@gmail.com

Physical Review Letters
|August 16, 2006
PubMed
Summary

Researchers demonstrate a new method for creating four-level quantum systems, called ququarts, using light polarization. This breakthrough simplifies quantum key distribution protocols without needing complex interferometers.

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