High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables.
High-fidelity teleportation beyond the no-cloning limit and entanglement swapping for continuous variables.
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DOI：
10.1103/physrevlett.94.220502
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发表时间：
2005-01
影响因子：
8.6
通讯作者：
N. Takei;H. Yonezawa;T. Aoki;A. Furusawa
中科院分区：
文献类型：
--
作者：
N. Takei;H. Yonezawa;T. Aoki;A. Furusawa
实验证明了连续变量量子隐形传态超越了不可克隆极限。我们传送了一个相干态，并实现了0.70 +/- 0.02的保真度，超过了2/3的不可克隆极限。为了转移输入量子态的非经典性，必须超越这个极限。通过使用我们的高保真传送器，我们演示了纠缠交换，即量子纠缠的传送，作为一个例子的非经典转移。
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.