Practical implementation of multilevel quantum cryptography

Journal Article · Mon May 15 00:00:00 EDT 2006 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776106050037· OSTI ID:21067695

Maslennikov, G A ^[1]; Moreva, E V ^[2]

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1. National University of Singapore (Singapore)
2. Moscow Engineering Physics Institute (State University) (Russian Federation)

The physical principles of a quantum key distribution protocol using four-level optical systems are discussed. Quantum information is encoded into polarization states created by frequency-nondegenerate spontaneous parametric down-conversion in collinear geometry. In the scheme under analysis, the required nonorthogonal states are generated in a single nonlinear crystal. All states in the selected basis are measured deterministically. The results of initial experiments on transformation of the basis polarization states of a four-level optical system are discussed.

• OSTI ID: 21067695
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 102, Issue 5; Other Information: DOI: 10.1134/S1063776106050037; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GEOMETRY
INFORMATION THEORY
NONLINEAR PROBLEMS
OPTICAL SYSTEMS
POLARIZATION
QUANTUM CRYPTOGRAPHY
QUANTUM INFORMATION
QUANTUM MECHANICS