JETP Letters

, Volume 96, Issue 5, pp 336–341

Quantum key distribution on composite photons, polarization qutrits


  • S. P. Kulik
    • Moscow State University
  • S. N. Molotkov
    • Moscow State University
    • Academy of Cryptography of the Russian Federation
    • Institute of Solid State PhysicsRussian Academy of Sciences
  • I. V. Radchenko
    • Prokhorov General Physics InstituteRussian Academy of Sciences
Quantum Information Science

DOI: 10.1134/S0021364012170080

Cite this article as:
Kulik, S.P., Molotkov, S.N. & Radchenko, I.V. Jetp Lett. (2012) 96: 336. doi:10.1134/S0021364012170080


Polarization states of a photon are the most natural degrees of freedom for encoding classical information bits. The two-dimensional space of states associated with polarization degrees of freedom of the photon is insufficient for many problems of information transfer with quantum states. We propose to use the polarization degrees of freedom of composite states of photons (polarization qutrits) for secret cryptographic key distribution.

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© Pleiades Publishing, Ltd. 2012