Local versus nonlocal cloning in a noisy environment

A Ferraro*, MGA Paris

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We address the distribution of quantum information among many parties in the presence of noise. In particular, we consider how to optimally send to m receivers the information encoded into an unknown coherent state. On one hand, a local strategy is considered, consisting in a local cloning process followed by direct transmission. On the other hand, a telecloning protocol based on nonlocal quantum correlations is analysed. Both the strategies are optimized to minimize the detrimental effects due to losses and thermal noise during the propagation. The comparison between the local and the nonlocal protocol shows that telecloning is more effective than local cloning for a wide range of noise parameters. Our results indicate that nonlocal strategies can be more robust against noise than local ones, thus being suitable candidates for playing a major role in quantum information networks.

Original languageEnglish
Pages (from-to)S532-S538
Number of pages7
JournalJournal of optics b-Quantum and semiclassical optics
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 2005
Event9th International Conference on Squeezed States and Unicertainty Relations (ICSSUR 05) - Besancon, France
Duration: 02 May 200506 May 2005

Keywords

  • cloning
  • telecloning
  • quantum communication
  • entanglement
  • continuous variables
  • QUANTUM TELEPORTATION
  • CONTINUOUS-VARIABLES
  • COHERENT STATES
  • ENTANGLEMENT

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