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dc.contributor.authorYu, Leo
dc.contributor.authorNatarajan , Chandra M.
dc.contributor.authorHorikiri, Tomoyuki
dc.contributor.authorLangrock, Carsten
dc.contributor.authorPelc, Jason S.
dc.contributor.authorTanner, Michael G.
dc.contributor.authorAbe, Eisuke
dc.contributor.authorMaier, Sebastian
dc.contributor.authorSchneider, Christian
dc.contributor.authorHöfling, Sven
dc.contributor.authorKamp, Martin
dc.contributor.authorHadfield, Robert H.
dc.contributor.authorFejer, Martin M.
dc.contributor.authorYamamoto, Yoshihisa
dc.identifier.citationYu , L , Natarajan , C M , Horikiri , T , Langrock , C , Pelc , J S , Tanner , M G , Abe , E , Maier , S , Schneider , C , Höfling , S , Kamp , M , Hadfield , R H , Fejer , M M & Yamamoto , Y 2015 , ' Two-photon interference at telecom wavelengths for time-bin-encoded single photons from quantum-dot spin qubits ' , Nature Communications , vol. 6 , 8955 .
dc.identifier.otherPURE: 240146297
dc.identifier.otherPURE UUID: 3b108b45-eae9-402d-b51f-db802a2c175e
dc.identifier.otherScopus: 84947967917
dc.identifier.otherWOS: 000366380800002
dc.descriptionThis work was supported by the JST through its ImPACT Program, NICT, NSF CCR-08 29694, NIST 60NANB9D9170, Special Coordination Funds for Promoting Science and Technology, and the State of Bavaria. C.L. and M.M.F. acknowledge support through the AFOSR. C.M.N. acknowledges a SU2P Entrepreneurial Fellowship and R.H.H. acknowledges a Royal Society University Research Fellowship.en
dc.description.abstractPractical quantum communication between remote quantum memories rely on single photons at telecom wavelengths. Although spin-photon entanglement has been demonstrated in atomic and solid-state qubit systems, the produced single photons at short wavelengths and with polarization encoding are not suitable for long-distance communication, because they suffer from high propagation loss and depolarization in optical fibres. Establishing entanglement between remote quantum nodes would further require the photons generated from separate nodes to be indistinguishable. Here, we report the observation of correlations between a quantum-dot spin and a telecom single photon across a 2-km fibre channel based on time-bin encoding and background-free frequency downconversion. The downconverted photon at telecom wavelengths exhibits two-photon interference with another photon from an independent source, achieving a mean wavepacket overlap of greater than 0.89 despite their original wavelength mismatch (900 and 911 nm). The quantum-networking operations that we demonstrate will enable practical communication between solid-state spin qubits across long distances.
dc.relation.ispartofNature Communicationsen
dc.rightsCopyright 2015 the Authors. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
dc.subjectQC Physicsen
dc.titleTwo-photon interference at telecom wavelengths for time-bin-encoded single photons from quantum-dot spin qubitsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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