Estimating entanglement of unknown states

被引：24

作者：

Cavalcanti, Daniel

Cunha, Marcelo O. Terra

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

[2] Univ Fed Minas Gerais, Dept Matemat, BR-30123970 Belo Horizonte, MG, Brazil

[3] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 08期

关键词：

D O I：

10.1063/1.2337535

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The experimental determination of entanglement is a major goal in the quantum information field. In general, the knowledge of the state is required in order to quantify its entanglement. Here we express a lower bound to the robustness of entanglement of a state based only on the measurement of the energy observable and on the calculation of a separability energy. This allows the estimation of entanglement dismissing the knowledge of the state in question. (c) 2006 American Institute of Physics.

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页数：3

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