KMS National Astronomical Observatories, CAS
| Intercontinental comparison of optical atomic clocks through very long baseline interferometry | |
| Pizzocaro, Marco1; Sekido, Mamoru2; Takefuji, Kazuhiro2,8; Ujihara, Hideki2; Hachisu, Hidekazu3; Nemitz, Nils3; Tsutsumi, Masanori3; Kondo, Tetsuro2,4; Kawai, Eiji2; Ichikawa, Ryuichi3; Namba, Kunitaka3; Okamoto, Yoshihiro3; Takahashi, Rumi3; Komuro, Junichi3; Clivati, Cecilia1; Bregolin, Filippo1,9; Barbieri, Piero1; Mura, Alberto1; Cantoni, Elena1; Cerretto, Giancarlo1; Levi, Filippo1; Maccaferri, Giuseppe5; Roma, Mauro5; Bortolotti, Claudio5; Negusini, Monia5; Ricci, Roberto1,5; Zacchiroli, Giampaolo5,6; Roda, Juri5; Leute, Julia6,7; Petit, Gerard6; Perini, Federico5; Calonico, Davide1; Ido, Tetsuya3 | |
| 2020-10-05 | |
| Source Publication | NATURE PHYSICS
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| ISSN | 1745-2473 |
| Pages | 12 |
| Abstract | The comparison of distant atomic clocks is foundational to international timekeeping, global positioning and tests of fundamental physics. Optical-fibre links allow the most precise optical clocks to be compared, without degradation, over intracontinental distances up to thousands of kilometres, but intercontinental comparisons remain limited by the performance of satellite transfer techniques. Here we show that very long baseline interferometry (VLBI), although originally developed for radio astronomy and geodesy, can overcome this limit and compare remote clocks through the observation of extragalactic radio sources. We developed dedicated transportable VLBI stations that use broadband detection and demonstrate the comparison of two optical clocks located in Italy and Japan separated by 9,000 km. This system demonstrates performance beyond satellite techniques and can pave the way for future long-term stable international clock comparisons. Very long baseline interferometry is used to compare two optical clocks located in Japan and Italy through the observation of extragalactic radio sources. This approach overcomes limitations of the performance of satellite transfer techniques. |
| Funding Organization | European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) |
| DOI | 10.1038/s41567-020-01038-6 |
| WOS Keyword | FREQUENCY TRANSFER ; LATTICE CLOCKS ; TIME ; GPS ; UNCERTAINTY ; REALIZATION ; GEODESY ; SYSTEM ; LEVEL ; RATIO |
| Language | 英语 |
| Funding Project | European Metrology Program for Innovation and Research (EMPIR)[15SIB03 OC18] ; European Metrology Program for Innovation and Research (EMPIR)[15SIB05 OFTEN] ; European Metrology Program for Innovation and Research (EMPIR)[17IND14 WRITE] ; European Metrology Program for Innovation and Research (EMPIR)[18SIB05 ROCIT] ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE[691156] ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF[ANR-10-LABX-48-01] ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GARR ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) |
| Funding Organization | European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) ; European Metrology Program for Innovation and Research (EMPIR) ; European Metrology Program for Innovation and Research (EMPIR) ; Italian Ministry of Education, University and Research ; Italian Ministry of Education, University and Research ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; Horizon 2020 Marie Skodowska-Curie Research and Innovation Staff Exchange (MSCA-RISE) project Q-SENSE ; European Union's Horizon 2020 research and innovation programme ; European Union's Horizon 2020 research and innovation programme ; EMPIR Participating States ; EMPIR Participating States ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; high-speed research network JGN ; high-speed research network JGN ; high-speed research network Internet2 ; high-speed research network Internet2 ; high-speed research network TransPAC ; high-speed research network TransPAC ; high-speed research network APAN ; high-speed research network APAN ; high-speed research network GEANT ; high-speed research network GEANT ; high-speed research network GARR ; high-speed research network GARR ; Research Coordination Committee ; Research Coordination Committee ; National Astronomical Observatory of Japan (NAOJ) ; National Astronomical Observatory of Japan (NAOJ) ; National Institutes of Natural Sciences (NINS) ; National Institutes of Natural Sciences (NINS) |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000575344700002 |
| Publisher | NATURE RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/81750 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Pizzocaro, Marco; Sekido, Mamoru |
| Affiliation | 1.Ist Nazl Ric Metrol INRIM, Turin, Italy 2.Natl Inst Informat & Commun Technol NICT, Kashima, Japan 3.Natl Inst Informat & Commun Technol NICT, Koganei, Tokyo, Japan 4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Shanghai, Peoples R China 5.Ist Radioastron IRA, Ist Nazl Astrofis INAF, Bologna, Italy 6.Bur Int Poids & Mesures BIPM, Sevres, France 7.Sorbonne Univ, Univ PSL, CNRS, LNE SYRTE,Observ Paris, Paris, France 8.Japan Aerosp Explorat Agcy JAXA, Nagano, Japan 9.Topt Photon AG, Grafelfing, Germany |
| Recommended Citation GB/T 7714 | Pizzocaro, Marco,Sekido, Mamoru,Takefuji, Kazuhiro,et al. Intercontinental comparison of optical atomic clocks through very long baseline interferometry[J]. NATURE PHYSICS,2020:12. |
| APA | Pizzocaro, Marco.,Sekido, Mamoru.,Takefuji, Kazuhiro.,Ujihara, Hideki.,Hachisu, Hidekazu.,...&Ido, Tetsuya.(2020).Intercontinental comparison of optical atomic clocks through very long baseline interferometry.NATURE PHYSICS,12. |
| MLA | Pizzocaro, Marco,et al."Intercontinental comparison of optical atomic clocks through very long baseline interferometry".NATURE PHYSICS (2020):12. |
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