TY - JOUR
T1 - Continuous-variable quantum network coding based on quantum discord
AU - Shang, Tao
AU - Liu, Ran
AU - Liu, Jianwei
AU - Hou, Yafei
N1 - Funding Information:
Funding Statement: This project is supported by the National Natural Science Foundation of China (No. 61571024, No. 61971021), Aeronautical Science Foundation of China (No. 2018ZC51016), and the National Key Research and Development Program of China (No. 2016YFC1000307) for valuable helps.
Publisher Copyright:
© 2020 Tech Science Press. All rights reserved.
PY - 2020/6/30
Y1 - 2020/6/30
N2 - Establishing entanglement is an essential task of quantum communication technology. Beyond entanglement, quantum discord, as a measure of quantum correlation, is a necessary prerequisite to the success of entanglement distribution. To realize efficient quantum communication based on quantum discord, in this paper, we consider the practical advantages of continuous variables and propose a feasible continuous-variable quantum network coding scheme based on quantum discord. By means of entanglement distribution by separable states, it can achieve quantum entanglement distribution from sources to targets in a butterfly network. Compared with the representative discrete-variable quantum network coding schemes, the proposed continuous-variable quantum network coding scheme has a higher probability of entanglement distribution and defends against eavesdropping and forgery attacks. Particularly, the deduced relationship indicates that the increase in entanglement is less than or equal to quantum discord.
AB - Establishing entanglement is an essential task of quantum communication technology. Beyond entanglement, quantum discord, as a measure of quantum correlation, is a necessary prerequisite to the success of entanglement distribution. To realize efficient quantum communication based on quantum discord, in this paper, we consider the practical advantages of continuous variables and propose a feasible continuous-variable quantum network coding scheme based on quantum discord. By means of entanglement distribution by separable states, it can achieve quantum entanglement distribution from sources to targets in a butterfly network. Compared with the representative discrete-variable quantum network coding schemes, the proposed continuous-variable quantum network coding scheme has a higher probability of entanglement distribution and defends against eavesdropping and forgery attacks. Particularly, the deduced relationship indicates that the increase in entanglement is less than or equal to quantum discord.
KW - Continuous variable
KW - Entanglement distribution
KW - Gaussian cloning
KW - Quantum discord
KW - Quantum network coding
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U2 - 10.32604/cmc.2020.09820
DO - 10.32604/cmc.2020.09820
M3 - Article
AN - SCOPUS:85090836791
SN - 1546-2218
VL - 64
SP - 1629
EP - 1645
JO - Computers, Materials and Continua
JF - Computers, Materials and Continua
IS - 3
ER -