This article is cited in 5 papers

QUANTUM INFORMATION SCIENCE

On the justification of quantum cryptography based on time shifts

S. N. Molotkov<sup>ab

a</sup> M. V. Lomonosov Moscow State University, Faculty of Computational Mathematics and Cybernetics
^b Institute of Solid State Physics, Russian Academy of Sciences

Abstract: The security of quantum cryptography based on time shifts has been mathematically proved. The procedures of preparing and measuring the most strongly localized states with a support in a finite frequency band are described. It has shown that measurements of states in the finite frequency band and a finite time window are sufficient for detecting any change in input states. The use of available multiplex fiber optic systems based on an arrayed waveguide grating for time-shift quantum cryptography is briefly discussed.

PACS: 03.67.Dt, 42.50.-p, 89.70.+c

Received: 08.09.2004

 English version: Journal of Experimental and Theoretical Physics Letters, 2004, 80:7, 507–512

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