Simple estimate of the critical length of a quantum communication channel with attenuation for coherent-state quantum cryptography |
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| Authors: | A. P. Makkaveev D. I. Pomozov S. N. Molotkov |
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| Affiliation: | (1) Faculty of Computational Mathematics and Cybernetics, Moscow State University, Vorob’evy gory, Moscow, 119899, Russia;(2) Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia |
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| Abstract: | For the B92 protocol with allowance for real attenuation and phase interruption of signal states in a one-dimensional optical fiber, a simple estimate is obtained for the critical length of the quantum communication channel that can provide secure key distribution. |
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