Experimentally friendly bounds on non-Gaussian entanglement from second moments

被引：17

作者：

Adesso, Gerardo ^{[1
,2
]}

机构：

[1] Univ Nottingham, Sch Math Sci, Nottingham NG7 2RD, England

[2] Univ Salerno, Dipartimento Matemat & Informat, I-84084 Salerno, Italy

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 02期

关键词：

Gaussian processes; matrix algebra; quantum entanglement; quantum optics; QUANTUM INFORMATION; STATES; ALGORITHM;

D O I：

10.1103/PhysRevA.79.022315

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that the entanglement in a class of two-mode non-Gaussian states obtained by subtracting photons from Gaussian twin beams can be bounded from above and from below by functionals of the second moments only. Knowledge of the covariance matrix thus suffices for an entanglement quantification with appreciable precision. The absolute error in the entanglement estimation scales with the non-Gaussianity of the considered states.

引用

页数：5

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