Gaussian entanglement for quantum key distribution from a single-mode squeezing source

被引：20

作者：

Eberle, Tobias ^{[1
,2
,3
]}

Haendchen, Vitus ^{[1
,2
,3
]}

Duhme, Joerg ^{[3
,4
]}

Franz, Torsten ^{[3
,4
]}

Furrer, Fabian ^{[5
]}

Schnabel, Roman ^{[1
,2
,3
]}

Werner, Reinhard F. ^{[3
,4
]}

机构：

[1] Leibniz Univ Hannover, Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Inst Gravitat Phys, D-30167 Hannover, Germany

[3] Leibniz Univ Hannover, Ctr Quantum Engn & Space Time Res QUEST, D-30167 Hannover, Germany

[4] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

[5] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

NEW JOURNAL OF PHYSICS | 2013年 / 15卷

基金：

日本学术振兴会;

关键词：

PODOLSKY-ROSEN PARADOX; EXPERIMENTAL GENERATION; EFFICIENCY;

D O I：

10.1088/1367-2630/15/5/053049

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the suitability of an Einstein-Podolsky-Rosen entanglement source for Gaussian continuous-variable quantum key distribution at 1550 nm. Our source is based on a single continuous-wave squeezed vacuum mode combined with a vacuum mode at a balanced beam splitter. Extending a recent security proof, we characterize the source by quantifying the extractable length of a composable secure key from a finite number of samples under the assumption of collective attacks. We show that distances in the order of 10 km are achievable with this source for a reasonable sample size despite the fact that the entanglement was generated including a vacuum mode. Our security analysis applies to all states having an asymmetry in the field quadrature variances, including those generated by superposition of two squeezed modes with different squeezing strengths.

引用

页数：14

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