Demonstration of a quantum teleportation network for continuous variables
Demonstration of a quantum teleportation network for continuous variables
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DOI：
10.1038/nature02858
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发表时间：
2004-09-23
期刊：
影响因子：
64.8
通讯作者：
Furusawa, A
中科院分区：
文献类型：
--
作者：
Yonezawa, H;Aoki, T;Furusawa, A
量子隐形传态(1-8)涉及将未知量子态从一个位置传输到另一个位置，而不需要信息载体的物理传输。尽管量子隐形传态是一个自然的二分过程，但它可以扩展到称为量子隐形传态网络的多部分协议(9)。在这样的网络中，纠缠在三方或更多方之间共享。对于三方（三方网络）的情况，量子态的隐形传态可以在任何对之间发生，但只能在第三方的协助下进行。多方量子协议有望成为更大规模量子通信和计算的基本组成部分(10,11)。在这里，我们报告了连续变量（电磁场模式）量子态的三方量子隐形传态网络的实验实现。我们演示了网络中三个不同对之间相干状态的隐形传输，明确地展示了其三方特征。
Quantum teleportation(1-8) 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 network(9). 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 computation(10,11). 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.