Quantum Nondemolition Detection of a Propagating Microwave Photon

被引：91

作者：

Sathyamoorthy, Sankar R. ^{[1
]}

Tornberg, L. ^{[1
]}

Kockum, Anton F. ^{[1
]}

Baragiola, Ben Q. ^{[2
]}

Combes, Joshua ^{[2
]}

Wilson, C. M. ^{[1
,3
,4
]}

Stace, Thomas M. ^{[5
]}

Johansson, G. ^{[1
]}

机构：

[1] Chalmers, Dept Microtechnol & Nanosci, S-41296 Gothenburg, Sweden

[2] Univ New Mexico, Ctr Quantum Informat & Control, Albuquerque, NM 87131 USA

[3] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[4] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada

[5] Univ Queensland, Sch Phys Sci, Ctr Engineered Quantum Syst, St Lucia, Qld 4072, Australia

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 09期

基金：

美国国家科学基金会; 瑞典研究理事会;

关键词：

FIELD; CIRCUIT; NUMBER;

D O I：

10.1103/PhysRevLett.112.093601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ability to nondestructively detect the presence of a single, traveling photon has been a long-standing goal in optics, with applications in quantum information and measurement. Realizing such a detector is complicated by the fact that photon-photon interactions are typically very weak. At microwave frequencies, very strong effective photon-photon interactions in a waveguide have recently been demonstrated. Here we show how this type of interaction can be used to realize a quantum nondemolition measurement of a single propagating microwave photon. The scheme we propose uses a chain of solid-state three-level systems (transmons) cascaded through circulators which suppress photon backscattering. Our theoretical analysis shows that microwave-photon detection with fidelity around 90% can be realized with existing technologies.

引用

页数：5

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