Separability of entangled q-bit pairs

被引：40

作者：

Englert, BG

Metwally, N

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[2] Univ Ulm, Abt Quantenphys, D-89081 Ulm, Germany

[3] Univ Munich, Sekt Phys, D-80333 Munich, Germany

来源：

JOURNAL OF MODERN OPTICS | 2000年 / 47卷 / 12期

关键词：

D O I：

10.1080/09500340008235144

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The state of an entangled q-bit pair is specified by 15 numerical parameters that are naturally regarded as the components of two 3-vectors and a 3 x 3 dyadic. There are easy-to-use criteria to check whether a given pair of 3-vectors plus a dyadic specify a 2-q-bit state; and if they do, whether the state is entangled; and if it is, whether it is a separable state. Some progress has been made in the search for analytical expressions for the degree of separability. We report, in particular, the answer in the case of vanishing 3-vectors.

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页码：2221 / 2231

页数：11

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