Long-distance single photon transmission from a trapped ion via quantum frequency conversion

Walker, Thomas, Miyanishi, Koichiro, Ikuta, Rikizo, Takahashi, Hiroki, Vartabi Kashanian, Samir, Tsujimoto, Yoshiaki, Hayasaka, Kazuhiro, Yamamoto, Takashi, Imoto, Nobuyuki and Keller, Matthias (2018) Long-distance single photon transmission from a trapped ion via quantum frequency conversion. Physical Review Letters, 120 (20). ISSN 0031-9007

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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 40Ca+ 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 10kmtransmitted 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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 24 May 2018 08:11
Last Modified: 24 May 2018 08:11
URI: http://srodev.sussex.ac.uk/id/eprint/76077

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Project NameSussex Project NumberFunderFunder Ref
UK Quantum Technology Hub: NQIT-Networked Quantum Information TechnologiesG1503EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M013243/1
Quantum Networking with Fibre-Coupled IonsG0755EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/J003670/1