Determination of continuous variable entanglement by purity measurements

被引：118

作者：

Adesso, G ^{[1
]}

Serafini, A ^{[1
]}

Illuminati, F ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Fis ER Caianiello, INFM UdR Salerno, INFN Sez Napoli,Grp Collegato Salerno, I-84081 Baronissi, SA, Italy

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.92.087901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We classify the entanglement of two-mode Gaussian states according to their degree of total and partial mixedness. We derive exact bounds that determine maximally and minimally entangled states for fixed global and marginal purities. This characterization allows for an experimentally reliable estimate of continuous variable entanglement based on measurements of purity.

引用

页数：4

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