Continuous-variable quantum network coding based on quantum discord

Tao Shang, Ran Liu, Jianwei Liu, Yafei Hou

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1629-1645
Number of pages17
JournalComputers, Materials and Continua
Issue number3
Publication statusPublished - Jun 30 2020


  • Continuous variable
  • Entanglement distribution
  • Gaussian cloning
  • Quantum discord
  • Quantum network coding

ASJC Scopus subject areas

  • Biomaterials
  • Modelling and Simulation
  • Mechanics of Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering


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