One-qubit reduced states of a pure many-qubit state: Polygon inequalities

被引：77

作者：

Higuchi, A ^{[1
]}

Sudbery, A ^{[1
]}

Szulc, J ^{[1
]}

机构：

[1] Univ York, Dept Math, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.90.107902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a necessary and sufficient condition for a set of n one-qubit mixed states to be the reduced states of a pure n-qubit state is that their smaller eigenvalues should satisfy polygon inequalities: each of them must be no greater than the sum of the others.

引用

页数：3

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