Quantum Illumination with Gaussian States

被引：543

作者：

Tan, Si-Hui ^{[1
]}

Erkmen, Baris I. ^{[2
]}

Giovannetti, Vittorio ^{[3
,4
]}

Guha, Saikat ^{[2
]}

Lloyd, Seth ^{[2
]}

Maccone, Lorenzo ^{[5
]}

Pirandola, Stefano ^{[2
]}

Shapiro, Jeffrey H. ^{[2
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

[3] INFM, CNR, NEST, I-56126 Pisa, Italy

[4] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[5] Univ Pavia, Dipartimento Fis A Volta, QUIT, I-27100 Pavia, Italy

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.101.253601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An optical transmitter irradiates a target region containing a bright thermal-noise bath in which a low-reflectivity object might be embedded. The light received from this region is used to decide whether the object is present or absent. The performance achieved using a coherent-state transmitter is compared with that of a quantum-illumination transmitter, i.e., one that employs the signal beam obtained from spontaneous parametric down-conversion. By making the optimum joint measurement on the light received from the target region together with the retained spontaneous parametric down-conversion idler beam, the quantum-illumination system realizes a 6 dB advantage in the error-probability exponent over the optimum reception coherent-state system. This advantage accrues despite there being no entanglement between the light collected from the target region and the retained idler beam.

引用

页数：4

共 11 条

[1] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].