Long-Distance Single Photon Transmission from a Trapped Ion via Quantum Frequency Conversion

被引：65

作者：

Walker, Thomas ^{[1
]}

Miyanishi, Koichiro ^{[2
]}

Ikuta, Rikizo ^{[2
]}

Takahashi, Hiroki ^{[1
]}

Kashanian, Samir Vartabi ^{[1
]}

Tsujimoto, Yoshiaki ^{[3
]}

Hayasaka, Kazuhiro ^{[3
]}

Yamamoto, Takashi ^{[2
]}

Imoto, Nobuyuki ^{[2
]}

Keller, Matthias ^{[1
]}

机构：

[1] Univ Sussex, Dept Phys & Astron, Brighton BN1 9RH, E Sussex, England

[2] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[3] Natl Inst Informat & Commun Technol NICT, Adv ICT Res Inst, Koganei, Tokyo 1848795, Japan

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

TELECOM-WAVELENGTH; UP-CONVERSION; COMMUNICATION; ENTANGLEMENT; WAVE; CAVITY; DOT;

D O I：

10.1103/PhysRevLett.120.203601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Trapped atomic ions are ideal single photon emitters with long-lived internal states which can be entangled with emitted photons. Coupling the ion to an optical cavity enables the efficient emission of single photons into a single spatial mode and grants control over their temporal shape. These features are key for quantum information processing and quantum communication. However, the photons emitted by these systems are unsuitable for long-distance transmission due to their wavelengths. Here we report the transmission of single photons from a single Ca-40(+) ion coupled to an optical cavity over a 10 km optical fiber via frequency conversion from 866 nm to the telecom C band at 1530 nm. We observe nonclassical photon statistics of the direct cavity emission, the converted photons, and the 10 km transmitted photons, as well as the preservation of the photons' temporal shape throughout. This telecommunication-ready system can be a key component for long-distance quantum communication as well as future cloud quantum computation.

引用

页数：5

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