This article is cited in 11 papers

ATOMS, SPECTRA, RADIATIONS

Operationalistic orthogonality condition for single-mode biphotons (qutrits)

A. A. Zhukov, G. A. Maslennikov, M. V. Chekhova

M. V. Lomonosov Moscow State University

Abstract: An arbitrary polarization state of a single-mode biphoton is considered. The operationalistic criterion is formulated for the orthogonality of these states. It can be used to separate a biphoton with an arbitrary degree of polarization from a set of biphotons orthogonal to it. This is necessary for the implementation of quantum cryptography protocol based on the three-level systems. The experimental test of this criterion amounts to the observation of the anticorrelation effect for a biphoton with an arbitrary polarization state.

PACS: 03.67.Hk, 42.25.Ja, 42.50.Dv

Received: 24.10.2002

 English version: Journal of Experimental and Theoretical Physics Letters, 2002, 76:10, 596–599

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