Quantum cloning and teleportation criteria for continuous quantum variables
Quantum cloning and teleportation criteria for continuous quantum variables
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DOI：
10.1103/physreva.64.010301
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发表时间：
2001-07-01
影响因子：
2.9
通讯作者：
Grangier, P
中科院分区：
文献类型：
--
作者：
Grosshans, F;Grangier, P
我们讨论了目前用于评估连续变量的量子隐形传态方案效率的标准。使用基于1对2量子克隆（量子复制）和1到无限克隆（经典测量）之间差异的论证，我们表明保真度值大于2/3保证了传送状态是输入状态的最佳剩余副本。到目前为止，这个数值在实验上还没有达到。
We discuss the criteria presently used for evaluating the efficiency of quantum teleportation schemes for continuous variables. Using an argument based upon the difference between 1-to-2 quantum cloning (quantum duplication) and 1-to-infinity cloning (classical measurement), we show that a fidelity value larger than 2/3 warrants that the teleported state is the best possible remaining copy of the input state. This value has not been reached experimentally so far.