On a two-pass scheme without a faraday mirror for free-space relativistic quantum cryptography

The stability of destructive interference independent of the input polarization and the state of a quantum communication channel in fiber optic systems used in quantum cryptography plays a principal role in providing the security of communicated keys. A novel optical scheme is proposed that can be u...

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Bibliographic Details
Published in:	Journal of experimental and theoretical physics Vol. 116; no. 5; pp. 711 - 720
Main Authors:	Kravtsov, K. S., Radchenko, I. V., Korol’kov, A. V., Kulik, S. P., Molotkov, S. N.
Format:	Journal Article
Language:	English
Published:	Moscow Nauka/Interperiodica 01-05-2013
Subjects:	Atoms Classical and Quantum Gravitation CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMMUNICATIONS ELECTROSTATIC MIRRORS Elementary Particles INTERFEROMETERS Molecules OPTICAL FIBERS Optics Particle and Nuclear Physics Physics Physics and Astronomy POLARIZATION QUANTUM CRYPTOGRAPHY Quantum Field Theory RELATIVISTIC RANGE Relativity Theory Solid State Physics Communication Channel Transfer Matrix Optical Scheme Destructive Interference Quantum Communication Channel
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Summary:	The stability of destructive interference independent of the input polarization and the state of a quantum communication channel in fiber optic systems used in quantum cryptography plays a principal role in providing the security of communicated keys. A novel optical scheme is proposed that can be used both in relativistic quantum cryptography for communicating keys in open space and for communicating them over fiber optic lines. The scheme ensures stability of destructive interference and admits simple automatic balancing of a fiber interferometer.
ISSN:	1063-7761 1090-6509
DOI:	10.1134/S1063776113040146