Analysis of the unambiguous state discrimination with unequal a priori probabilities
https://doi.org/10.17586/2220-8054-2019-10-4-398-401
Abstract
In this paper, we study unambiguous state discrimination regarding advanced attack on phase-coded quantum key distribution protocol. We propose the method of optimal unambiguous state discrimination probability derivation as a function of a priori probabilities for signal states. The expression obtained as an example in case of two signal states explicitly demonstrates the additional term dependent on small deviations from equal a priori probabilities that may take place in real quantum key distribution implementations. Precise estimation of optimal unambiguous state discrimination probability is significant for complete evaluation of quantum key distribution security.
Supporting agencies: This work was financially supported by the Ministry of Education and Science of Russian Federation (contract No. 03.G25.31.0229).
About the Authors
A. A. Gaidash
ITMO University
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
S. S. Medvedeva
ITMO University
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
G. P. Miroshnichenko
ITMO University
Russian Federation
Russian Federation
Kronverkskiy, 49, St. Petersburg, 197101
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Review
For citations:
Gaidash A.A., Medvedeva S.S., Miroshnichenko G.P. Analysis of the unambiguous state discrimination with unequal a priori probabilities. Nanosystems: Physics, Chemistry, Mathematics. 2019;10(4):398–401. https://doi.org/10.17586/2220-8054-2019-10-4-398-401
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