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Nanosystems: Physics, Chemistry, Mathematics, 2021, Volume 12, Issue 6, Pages 697–702
DOI: https://doi.org/10.17586/2220-8054-2021-12-6-697-702 (Mi nano1067) 		 
PHYSICS

Discrimination and decoherence of Schrödinger cat states in lossy quantum channels

R. K. Goncharovab, A. D. Kiselevab, N. G. Veselkovaa, Ranim Alic, F. D. Kiselevab

a Quantum Information Laboratory, ITMO University, Kadetskaya Line, 3, 199034 Saint Petersburg, Russia
b Laboratory of Quantum Processes and Measurements, ITMO University, Kadetskaya Line, 3, 199034 Saint Petersburg, Russia
c Faculty of Photonics, ITMO University, Kronverksky Pr. 49, bldg. A, 197101 Saint Petersburg, Russia
Full-text PDF (6888 kB)
DOI: https://doi.org/10.17586/2220-8054-2021-12-6-697-702
Abstract: We investigate environment induced effects of decoherence in discrimination between the Schrödinger cat states transmitted through noisy quantum channels such as optical fibers. We calculate the fidelity and the statistics of photocounts for both even and odd coherent states. The method that uses the beam splitter-like transformation acting in the enlarged Hilbert space to model the quantum channel is compared with the approach based on the Lindblad dynamics of one-mode bosonic systems.
Keywords: Schrödinger cat states, decoherence, quantum state discrimination.
Funding agency Grant number
Ministry of Digital Development, Communications and Mass Media of the Russian Federation 0000000007119P190002
Ministry of Education and Science of the Russian Federation 2019-0903
The work was done by Leading Research Center “National Center of Quantum Internet” of ITMO University during the implementation of the government support program, with the financial support of Ministry of Digital Development, Communications and Mass Media of the Russian Federation and RVC JSC; Grant Agreement ID: 0000000007119P190002, agreement No. 006-20 dated 27.03.2020. A.D.K. acknowledges financial support by the Ministry of Education and Science of the Russian Federation (Grant No. 2019-0903).
Received: 20.11.2021
Revised: 30.11.2021
Bibliographic databases:
Document Type: Article
Language: English
Citation: R. K. Goncharov, A. D. Kiselev, N. G. Veselkova, Ranim Ali, F. D. Kiselev, “Discrimination and decoherence of Schrödinger cat states in lossy quantum channels”, Nanosystems: Physics, Chemistry, Mathematics, 12:6 (2021), 697–702
Citation in format AMSBIB
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\by R.~K.~Goncharov, A.~D.~Kiselev, N.~G.~Veselkova, Ranim~Ali, F.~D.~Kiselev
\paper Discrimination and decoherence of Schr\"odinger cat states in lossy quantum channels
\jour Nanosystems: Physics, Chemistry, Mathematics
\yr 2021
\vol 12
\issue 6
\pages 697--702
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\crossref{https://doi.org/10.17586/2220-8054-2021-12-6-697-702}
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\elib{https://elibrary.ru/item.asp?id=47578535}
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