Open Access
ARTICLE
Continuous-Variable Quantum Network Coding Based on Quantum Discord
Tao Shang1, *, Ran Liu1, Jianwei Liu1, Yafei Hou2
1 School of Cyber Science & Technology, Beihang University, Beijing, 100083, China.
2 Graduate School of Natural Science and Technology, Okayama University, Okayama Prefecture, 700-8530, Japan.
* Corresponding Author: Tao Shang. Email: .
Computers, Materials & Continua 2020, 64(3), 1629-1645. https://doi.org/10.32604/cmc.2020.09820
Received 20 January 2020; Accepted 10 April 2020; Issue published 30 June 2020
Abstract
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.
Keywords
Cite This Article
T. Shang, R. Liu, J. Liu and Y. Hou, "Continuous-variable quantum network coding based on quantum discord,"
Computers, Materials & Continua, vol. 64, no.3, pp. 1629–1645, 2020.