Nonlocal parameters for multiparticle density matrices

被引：127

作者：

Linden, N ^{[1
]}

Popescu, S

Sudbery, A

机构：

[1] Isaac Newton Inst Math Sci, Cambridge CB3 0EH, England

[2] Hewlett Packard Labs, BRIMS, Bristol BS12 6QZ, Avon, England

[3] Univ York, Dept Math, York YO1 5DD, N Yorkshire, England

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.83.243

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

As far as entanglement is concerned, two density matrices of n particles are completely equivalent if one can be transformed into the other by local unitary transformations. We present two methods to find whether or not two generic density matrices of arbitrary numbers of spin-1/2 particles are equivalent. Both methods describe density matrices in terms of a finite number of invariant parameters.

引用

页码：243 / 247

页数：5

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