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

  title={High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables.},
  author={Nobuyuki Takei and Hidehiro Yonezawa and Takao Aoki and Akira Furusawa},
  journal={Physical review letters},
  volume={94 22},
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. 

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