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- W4313482679 abstract "In order for the deployment of quantum communication technologies in a global scale, it is necessary to meet data exchange demand of various size establishments per certain time intervals and it is important to make them cost effective and feasible. In order to meet these requirements, a lot of effort has been put into increasing key rate and having optimized systems. In this study, we focus on the improvement of raw key rate in a standardized E91 QKD system without compromising its security. Our method is to optimize photon budget allocation among three types of bits used in the system for different purposes or occurred unavoidably. These three types of bits are key bits, Bell's inequality bits and discarded bits and their ratios were $25%$, $50%$ and $25%$, respectively, in the proof-of-principle experiment. On the other hand, we present $226.22%$ increase in raw key rate with $83%$, $10%$ and $7%$ allocation of photon budget among three types of bits. These ratios are achieved by replacing $50:50$ beam splitters with a $90:10$ beam splitter at one communicating side and a $93:7$ beam splitter at the other communicating side. Additionally, we demonstrate that the optimum beam splitting ratios can vary depending on photon budget." @default.
- W4313482679 created "2023-01-06" @default.
- W4313482679 creator A5004001325 @default.
- W4313482679 creator A5041363687 @default.
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- W4313482679 date "2022-12-28" @default.
- W4313482679 modified "2023-09-30" @default.
- W4313482679 title "Optimal photon budget allocation in E91 protocol" @default.
- W4313482679 doi "https://doi.org/10.48550/arxiv.2212.13837" @default.
- W4313482679 hasPublicationYear "2022" @default.
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