Experimental investigation of criteria for continuous variable entanglement

被引：214

作者：

Bowen, WP ^{[1
]}

Schnabel, R

Lam, PK

Ralph, TC

机构：

[1] Australian Natl Univ, Fac Sci, Dept Phys, Canberra, ACT 0200, Australia

[2] Univ Queensland, Dept Phys, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.90.043601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We generate a pair of entangled beams from the interference of two amplitude squeezed beams. The entanglement is quantified in terms of EPR paradox and inseparability criteria, with both results clearly beating the standard quantum limit. We experimentally analyze the effect of decoherence on each criterion and demonstrate qualitative differences. We also characterize the number of required and excess photons present in the entangled beams and provide contour plots of the efficacy of quantum information protocols in terms of these variables.

引用

页数：4

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