Explicit product ensembles for separable quantum states

被引：33

作者：

Schack, R ^{[1
]}

Caves, CM

机构：

[1] Univ New Mexico, Ctr Adv Studies, Dept Phys & Astron, Albuquerque, NM 87131 USA

[2] Univ London Royal Holloway & Bedford New Coll, Dept Math, Egham TW20 0EX, Surrey, England

来源：

JOURNAL OF MODERN OPTICS | 2000年 / 47卷 / 2-3期

关键词：

D O I：

10.1080/095003400148286

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a general method for constructing pure-product-state representations for density operators of hi quantum bits. If such a representation has non-negative expansion coefficients, it provides an explicit separable ensemble for the density operator. We derive the condition for separability of a mixture of the Greenberger-Horne-Zeilinger state with the maximally mixed state.

引用

页码：387 / 399

页数：13

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