Mixedness and teleportation
Mixedness and teleportation
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DOI：
10.1103/physreva.61.040101
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发表时间：
1999-12
影响因子：
2.9
通讯作者：
S. Bose;V. Vedral
中科院分区：
文献类型：
--
作者：
S. Bose;V. Vedral
我们表明，在超过一定程度的混合（由冯·诺伊曼熵量化）时，纠缠态对于隐形传态是无用的。通过增加纠缠系统的维数，可以使熵阈值任意接近最大值。发现该熵超过了足以保证密集编码失败的熵阈值。
We show that on exceeding a certain degree of mixedness (as quantified by the von Neumann entropy), entangled states become useless for teleporatation. By increasing the dimension of the entangled systems, this entropy threshold can be made arbitrarily close to maximal. This entropy is found to exceed the entropy threshold sufficient to ensure the failure of dense coding.