The parts determine the whole in a generic pure quantum state

被引：67

作者：

Linden, N

Wootters, WK

机构：

[1] Univ Bristol, Sch Math, Bristol BS8 1TW, Avon, England

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

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.89.277906

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that almost every pure state of multiparty quantum systems (each of whose local Hilbert space has the same dimension) is completely determined by the state's reduced density matrices of a fraction of the parties; this fraction is less than about two-thirds of the parties for states of large numbers of parties. In other words, once the reduced states of this fraction of the parties have been specified, there is no further freedom in the state.

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页码：277906 / 277906

页数：4

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