Improving the performance of the four-state continuous-variable quantum key distribution by using optical amplifiers
Date
2012
Authors
Zhang, H.
Fang, J.
He, G.
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Journal article
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Physical Review A: Atomic, Molecular and Optical Physics, 2012; 86(2, article no. 022338):022338-1-022338-7
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Abstract
We propose a method to improve the secret key rates of four-state continuous-variable quantum key distribution by using an optical preamplifier. The modified protocol allows the distribution of higher secret key rates over long distances. Included in this paper is a detailed investigation of the effects of inserting an optical parametric amplifier into the output of the quantum channel in the four-state protocol, which will be instructive and meaningful about the usage of amplifiers in order to achieve the optimal performance of the protocol in a specific scenario.
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Link to a related website: http://pdfs.semanticscholar.org/79bb/616053c98b9ed6d4d166d74a01051377a9dc.pdf, Open Access via Unpaywall
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Copyright 2012 American Physical Society