Demonstration of a Single-Photon Router in the Microwave Regime

被引：410

作者：

Hoi, Io-Chun ^{[1
]}

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

Johansson, Goran ^{[1
]}

Palomaki, Tauno ^{[1
]}

Peropadre, Borja ^{[2
]}

Delsing, Per ^{[1
]}

机构：

[1] Chalmers, MC2, S-41296 Gothenburg, Sweden

[2] CSIC, Inst Fis Fundamental Serrano, Madrid, Spain

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 07期

基金：

瑞典研究理事会; 欧洲研究理事会;

关键词：

RESONANCE FLUORESCENCE; TRANSISTOR; MOLECULE; CIRCUIT; OPTICS; CAVITY; LIGHT; ATOM;

D O I：

10.1103/PhysRevLett.107.073601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have embedded an artificial atom, a superconducting transmon qubit, in an open transmission line and investigated the strong scattering of incident microwave photons (similar to 6 GHz). When an input coherent state, with an average photon number N << 1 is on resonance with the artificial atom, we observe extinction of up to 99.6% in the forward propagating field. We use two-tone spectroscopy to study scattering from excited states and we observe electromagnetically induced transparency (EIT). We then use EIT to make a single-photon router, where we can control to what output port an incoming signal is delivered. The maximum on-off ratio is around 99% with a rise and fall time on the order of nanoseconds, consistent with theoretical expectations. The router can easily be extended to have multiple output ports and it can be viewed as a rudimentary quantum node, an important step towards building quantum information networks.

引用

页数：5

共 32 条

[1] Electromagnetically Induced Transparency on a Single Artificial Atom [J].