Demonstration of a quantum teleportation network for continuous variables

Hidehiro Yonezawa, Takao Aoki and Akira Furusawa ()
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Hidehiro Yonezawa: The University of Tokyo
Takao Aoki: The University of Tokyo
Akira Furusawa: The University of Tokyo

Nature, 2004, vol. 431, issue 7007, 430-433

Abstract: Abstract Quantum teleportation1,2,3,4,5,6,7,8 involves the transportation of an unknown quantum state from one location to another, without physical transfer of the information carrier. Although quantum teleportation is a naturally bipartite process, it can be extended to a multipartite protocol known as a quantum teleportation network9. In such a network, entanglement is shared between three or more parties. For the case of three parties (a tripartite network), teleportation of a quantum state can occur between any pair, but only with the assistance of the third party. Multipartite quantum protocols are expected to form fundamental components for larger-scale quantum communication and computation10,11. Here we report the experimental realization of a tripartite quantum teleportation network for quantum states of continuous variables (electromagnetic field modes). We demonstrate teleportation of a coherent state between three different pairs in the network, unambiguously demonstrating its tripartite character.

Date: 2004
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DOI: 10.1038/nature02858

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