High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables

Nobuyuki Takei, Hidehiro Yonezawa, Takao Aoki, Akira Furusawa

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Abstract

We experimentally demonstrate continuous-variable quantum teleportation beyond the no-cloning limit. We teleport a coherent state and achieve the fidelity of 0.70±0.02 that surpasses the no-cloning limit of 2/3. Surpassing the limit is necessary to transfer the nonclassicality of an input quantum state. By using our high-fidelity teleporter, we demonstrate entanglement swapping, namely, teleportation of quantum entanglement, as an example of transfer of nonclassicality.

Original languageEnglish
Article number220502
JournalPhysical Review Letters
Volume94
Issue number22
DOIs
Publication statusPublished - 2005 Jun 10
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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