Experimental demonstration of quantum teleportation of a squeezed state
Experimental demonstration of quantum teleportation of a squeezed state
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DOI：
10.1103/physreva.72.042304
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发表时间：
2005-10-01
影响因子：
2.9
通讯作者：
Furusawa, A
中科院分区：
文献类型：
--
作者：
Takei, N;Aoki, T;Furusawa, A
实验证明了压缩态的量子隐形传态。由于实验中不可避免的损失，压缩真空必然成为混合态，而不再是最小测不准态。我们建立了一种利用保真度来评估量子隐形传态的操作方法，并讨论了这种态的经典极限。测得的输入态保真度为0.85+/-0.05，高于经典情况下的0.73+/-0.04。我们还验证了对于非古典态输入，隐形传态过程是正确的，并且它的压缩方差肯定是通过该过程传递的。我们观察到传输压缩态的变化比真空态输入的变化要小。
Quantum teleportation of a squeezed state is demonstrated experimentally. Due to some inevitable losses in experiments, a squeezed vacuum necessarily becomes a mixed state which is no longer a minimum uncertainty state. We establish an operational method of evaluation for quantum teleportation of such a state using fidelity and discuss the classical limit for the state. The measured fidelity for the input state is 0.85 +/- 0.05, which is higher than the classical case of 0.73 +/- 0.04. We also verify that the teleportation process operates properly for the nonclassical state input and its squeezed variance is certainly transferred through the process. We observe the smaller variance of the teleported squeezed state than that for the vacuum state input.