Mixedness and teleportation

被引：106

作者：

Bose, S ^{[1
]}

Vedral, V ^{[1
]}

机构：

[1] Univ Oxford, Clarendon Lab, Ctr Quantum Computat, Oxford OX1 3PU, England

来源：

PHYSICAL REVIEW A | 2000年 / 61卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.61.040101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that on exceeding a certain degree of mixedness las quantified by the von Neumann entropy), entangled states become useless for teleportation. 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.

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页数：2

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