Entanglement of a pair of quantum bits

被引：2345

作者：

Hill, S

Wootters, WK

机构：

[1] Department of Physics, Williams College, Williamstown, MA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.78.5022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ''entanglement of formation'' of a mixed state rho of a bipartite quantum system can be defined as the minimum;number of singlets needed to create an ensemble of pure states that represents rho. We find an exact formula for the entanglement of formation for all mixed states of two qubits having no more than two nonzero eigenvalues, and we report evidence suggesting that the formula is valid for all states of this system.

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页码：5022 / 5025

页数：4

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