Entanglement of formation of an arbitrary state of two qubits

被引：7127

作者：

Wootters, WK ^{[1
]}

机构：

[1] Williams Coll, Dept Phys, Williamstown, MA 01267 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.80.2245

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The entanglement of a pure state of a pair of quantum systems is defined as the entropy of either member of the pair. The entanglement of formation of a mixed state rho is the minimum average entanglement of an ensemble of pure states that represents rho. An earlier paper conjectured an explicit formula for the entanglement of formation of a pair of binary quantum objects (qubits) as a function of their density matrix, and proved the formula for special states. The present paper extends the proof to arbitrary states of this system and shows hew to construct entanglement-minimizing decompositions.

引用

页码：2245 / 2248

页数：4

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