Path Entanglement of Continuous-Variable Quantum Microwaves

被引：144

作者：

Menzel, E. P. ^{[1
,2
]}

Di Candia, R. ^{[3
]}

Deppe, F. ^{[1
,2
]}

Eder, P. ^{[1
,2
]}

Zhong, L. ^{[1
,2
]}

Ihmig, M. ^{[4
]}

Haeberlein, M. ^{[1
,2
]}

Baust, A. ^{[1
,2
]}

Hoffmann, E. ^{[1
,2
]}

Ballester, D. ^{[3
,5
]}

Inomata, K. ^{[6
]}

Yamamoto, T. ^{[6
,7
]}

Nakamura, Y. ^{[6
,8
]}

Solano, E. ^{[3
,9
]}

Marx, A. ^{[1
]}

Gross, R. ^{[1
,2
]}

机构：

[1] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[3] Univ Basque Country, Dept Quim Fis, EHU, E-48080 Bilbao, Spain

[4] Tech Univ Munich, Lehrstuhl Integrierte Syst, D-80333 Munich, Germany

[5] UCL, Dept Phys & Astron, London WC1E 6BT, England

[6] RIKEN Adv Sci Inst, Wako, Saitama 3510198, Japan

[7] NEC Smart Energy Res Labs, Tsukuba, Ibaraki 3058501, Japan

[8] Univ Tokyo, RCAST, Meguro Ku, Tokyo 1538904, Japan

[9] Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

QUBITS;

D O I：

10.1103/PhysRevLett.109.250502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Path entanglement constitutes an essential resource in quantum information and communication protocols. Here, we demonstrate frequency-degenerate entanglement between continuous-variable quantum microwaves propagating along two spatially separated paths. We combine a squeezed and a vacuum state using a microwave beam splitter. Via correlation measurements, we detect and quantify the path entanglement contained in the beam splitter output state. Our experiments open the avenue to quantum teleportation, quantum communication, or quantum radar with continuous variables at microwave frequencies.

引用

页数：4

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