ACHIVEMENT 

since Nobember 15, 2018

Paper   /    Invited Speech   /    Conference   /    Book & Article   /    Prize

Paper(gloval)

2021 papers
2021.08 N. Ohmae, M. Takamoto, Y. Takahashi, M. Kokubun, K. Araki, A. Hinton, I. Ushijima, T. Muramatsu, T. Furumiya, Y. Sakai, N. Moriya, N. Kamiya, K. Fujii, R. Muramatsu, T. Shiimado, and H. Katori, Front Cover: Transportable Strontium Optical Lattice Clocks Operated Outside Laboratory at the Level of 10−18 Uncertainty (Adv. Quantum Technol. 8/2021), Advanced Quantum Technologies Volume4, Issue8, August 2021, 2170081.
https://doi.org/10.1002/qute.202170081
2021.07 Yoshiyuki Tanaka, and Hidetoshi Katori, Exploring potential applications of optical lattice clocks in a plate subduction zone, Journal of Geodesy volume 95, Article number: 93 (2021).
https://doi.org/10.1007/s00190-021-01548-y
2021.06 Hidetoshi Katori, Longitudinal Ramsey spectroscopy of atoms for continuous operation of optical clocks, Applied Physics Express, 2021-06-23, journal-article.
https://doi.org/10.35848/1882-0786/ac0e16
2021.05 N. Ohmae, M. Takamoto, Y. Takahashi, M. Kokubun, K. Araki, A. Hinton, I. Ushijima, T. Muramatsu, T. Furumiya, Y. Sakai, N. Moriya, N. Kamiya, K. Fujii, R. Muramatsu, T. Shiimado, and H. Katori, Transportable Strontium Optical Lattice Clocks Operated Outside Laboratory at the Level of 10−18 Uncertainty, Advanced Quantum Technologies 2021, 2100015.
https://doi.org/10.1002/qute.202100015
2020 papers
2021.03 M. Sekido, K. Takefuji, H. Ujihara, T. Kondo, M. Tsutsumi, E. Kawai, H. Hachisu, N. Nemitz, M. Pizzocaro, C. Clivati, F. Perini, M. Negusini, G. Maccaferri, R. Ricci, M. Roma, C. Bortolotti, K. Namba, J. Komuro, R. Ichikawa, T. Suzuyama, K. Watabe, J. Leute, G. Petit, D. Calonico and T. Ido, A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept, Journal of Geodesy volume 95, Article number: 41 (2021).
https://doi.org/10.1007/s00190-021-01479-8
2021.03 N. Nemitz, T. Gotoh, F. Nakagawa, H. Ito, Y. Hanado, T. Ido, and H. Hachisu, Absolute frequency of 87Sr at 1.8×10-16 uncertainty by reference to remote Primary Frequency Standards, Metrologia, Volume 58, Number 2, 15 February 2021.
https://doi.org/10.1088/1681-7575/abc232
2021.02 Tomoya Akatsuka, Koji Hashiguchi, Tadahiro Takahashi, Noriaki Ohmae, Masao Takamoto, and Hidetoshi Katori, Three-stage laser cooling of Sr atoms using the 5s5p3P2 metastable state below Doppler temperatures, Phys. Rev. A 103, 023331 – Published 25 February 2021.
https://doi.org/10.1103/PhysRevA.103.023331
2021.01 Yusuke Hisai, Daisuke Akamatsu, Takumi Kobayashi, Kazumoto Hosaka, Hajime Inaba, Feng-Lei Hong and Masami Yasuda, Improved frequency ratio measurement with 87Sr and 171Yb optical lattice clocks at NMIJ, Metrologia, Accepted Manuscript online 14 October 2020 • © 2020 BIPM & IOP Publishing Ltd.
https://doi.org/10.1088/1681-7575/abc104
2020.11 Takumi Kobayashi, Daisuke Akamatsu, Kazumoto Hosaka, Yusuke Hisai, Masato Wada, Hajime Inaba, Tomonari Suzuyama, Feng-Lei Hong and Masami Yasuda, Demonstration of the nearly continuous operation of an 171Yb optical lattice clock for half a year, Metrologia, Volume 57, Number 6, Published 2 November 2020 • © 2020 BIPM & IOP Publishing Ltd.
https://doi.org/10.1088/1681-7575/ab9f1f
2020.10 M. Pizzocaro, M. Sekido, K. Takefuji, H. Ujihara, H. Hachisu, N. Nemitz, M. Tsutsumi, T. Kondo, E. Kawai, R. Ichikawa, K. Namba, Y. Okamoto, R. Takahashi, J. Komuro, C. Clivati, F. Bregolin, P. Barbieri, A. Mura, E. Cantoni, G. Cerretto, F. Levi, G. Maccaferri, M. Roma, C. Bortolotti, M. Negusini, R. Ricci, G. Zacchiroli, J. Roda, J. Leute, G. Petit, F. Perini, D. Calonico and T. Ido, Intercontinental comparison of optical atomic clocks through very long baseline interferometry, Nature Physics volume 17, pages223–227(2021).
https://doi.org/10.1088/1681-7575/ab9f1f
2020.05 Noriaki Ohmae, Filippo Bregolin, Nils Nemitz, and Hidetoshi Katori, Direct measurement of the frequency ratio for Hg and Yb optical lattice clock and closure of the Hg/Yb/Sr loop, Optics Express, Vol. 28, Issue 10, pp.15112-15121 (2020).
https://doi.org/10.1364/OE.391602
2020.04 Masao Takamoto, Ichiro Ushijima, Noriaki Ohmae, Toshihiro Yahagi, Kensuke Kokado, Hisaaki Shinkai & Hidetoshi Katori, Test of General Relativity by a Pair of Transportable Optical Lattice Clocks, Nature Photonics (2020).
https://doi.org/10.1038/s41566-020-0619-8
2020.03 Tomoya Akatsuka, Takashi Goh, Hiromitsu Imai, Katsuya Oguri, Atsushi Ishizawa, Ichiro Ushijima, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori, Toshikazu Hashimoto, Hideki Gotoh, and Tetsuomi Sogawa, Optical frequency distribution using laser repeater stations with planar lightwave circuits, Optics Express, Volume 28, Issue 7, pp. 9186-9197 (2020).
https://doi.org/10.1364/OE.383526
2019 papers
2019.11 Shoichi Okaba, Deshui Yu, Luca Vincetti, Fetah Benabid, and Hidetoshi Katori, Superradiance from Lattice-Confined Atoms inside Hollow Core Fibre, Commun. Physics 2, 136-1-10 (2019).
https://doi.org/10.1038/s42005-019-0237-2
2019.10 Koji Hashiguchi, Tomoya Akatsuka, Noriaki Ohmae, Masao Takamoto, and Hidetoshi Katori, Frequency measurement on the 5s5p3P2-5s4d3D3 transition of 88Sr atoms using the photon-momentum-transfer technique, Phys. Rev. A 100, 042513-1-7 (2019).
https://doi.org/10.1103/PhysRevA.100.042513
2019.09 Takumi Kobayashia, Daisuke Akamatsu, Kazumoto Hosaska, and Masami Yasuda, A relocking scheme for optical phase locking using a digital circuit with an electrical delay line, Review of Scientific Instruments 90, 103002 (2019).
https://doi.org/10.1063/1.5111935
2019.09 Atsushi Yamaguchi, Marianna S. Safronova, Kurt Gibble, and Hidetoshi Katori, Narrow-line cooling and determination of magic wavelength of Cd, Phys. Rev. Lett. 123, 113201-1-6 (2019).
https://doi.org/10.1103/PhysRevLett.123.113201
2019.09 Takaaki Jike, Tomoaki Oyama, Takumi Nagayama, and Aya Yamauchi, Current Results of the VERA K/Q-band Fringe Survey: Performance of the 8-Gbps Recording System and its Effectiveness, IVS 2018 General Meeting Proceedings.
2019.05 Noriaki Ohmae, and Hidetoshi Katori, 626-nm single-frequency semiconductor laser system operated near room temperature for mw-level second-harmonic generation at 313 nm, Rev. Sci. Instrum 90, 063201-1-5 (2019).
https://doi.org/10.1063/1.5096368
2019.03 Nils Nemitz, Asbjorn Arvad Jorgensen, Ryotatsu Yanagimoto, Filipo Bregolin, and Hidetoshi Katori, Modeling light shifts in optical lattice clocks, Phys. Rev. A 99, 033424 – Published 28 March 2019.
https://doi.org/10.1103/PhysRevA.99.033424
2019.03 Yoshiyuki Tanaka, Volker Klemann, and Zdenek Martinec, Surface loading of a self-gravitating, laterally heterogeneous elastic sphere –preliminary result for the 2D case, International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 151).
https://doi.org/10.1007/1345_2019_62
2019.03 Noriaki Ohmae, Shunsuke Sakama, Hidetoshi Katori, High-stability optical frequency transfer with all-fiber architecture for optical lattice clocks, Electron. Comm. Jpn. 102, 43-48 (2019).
https://doi.org/10.1002/ecj.12167
2018.12 Ichiro Ushijima, Masao Takamoto, and Hidetoshi Katori, Operational Magic Intensity for Sr Optical Lattice Clocks, Phys. Rev. Lett. 121, 263202 – Published 28 December 2018.
https://doi.org/10.1103/PhysRevLett.121.263202

Invited Speech(gloval)

2020 Invited Speech
2020.9 Hidetoshi Katori, Transportable Optical Lattice Clocks to Test Gravitational Redshift, OSA Quantum 2.0 Conference(Online: 2020/9/14).  
2020.8 Masao Takamoto, Development of Transportable Optical Lattice Clocks and Test of General Relativity, 2020 NCHU-RIKEN Workshop on Devices and Materials(Online: 2020/8/27).  
2020.6 Hidetoshi Katori, Transportable Optical Lattice Clocks to Test Gravitational Redshift, 51st Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics(Online: 2020/6/4).  
2020.5 Masao Takamoto, Noriaki Ohmae, Ichiro Ushijima, Hidetoshi Katori, Development of transportable optical lattice clocks for geodetic applications, CLEO 2020(Online: 2020/5/11).  
2019 Invited Speech
2019.12 Hidetoshi Katori, Transportable Optical Lattice Clocks to Test Gravitational Redshift, EU-USA-Japan International Symposium on Quantum Technology(ISQT)(Japan: 2019/12/16).  
2019.11 Hidetoshi Katori, Transportable Optical Lattice Clocks to Test Gravitational Redshift, ENS/UTokyo WS on Physics(Japan: 2019/11/25).  
2019.11 Hidetoshi Katori, Optical lattice clocks “From curiosity-driven research to practical devices”, QUANTUM TECHNOLOGY SEMINAR ~How collaboration of Japanese and Danish researchers is contributing to current and future innovation~(Denmark: 2019/11/21).  
2019.10 Hidetoshi Katori, Optical lattice clocks and their field operation, Physics of fundamental Symmetries and Interactions - PSI2019(Switzerland: 2019/10/20).  
2019.9 Yoshiyuki Tanaka, TPotential applications of optical lattice clocks in geodesy -an introduction-, APEC Seminar(Japan: 2019/9/18).  
2019.9 Hidetoshi Katori, Optical lattice clocks---From curiosity-driven research to practical devices---, UK-Japan Quantum Technology Workshop(Japan: 2019/9/10).  
2019.9 Tetsuya Ido, Hidekazu Hachisu, Nils Nemitz, Fumimaru Nakagawa, Yuko Hanado, Application of optical clocks toward real-time generation of a time scale, URSI-JRSM(Japan: 2019/9/6).  
2019.7 Hidetoshi Katori, Optical lattice clocks and their applications---From curiosity-driven research (1999) to practical devices---, ICPEAC Dequville 2019(France: 2019/7/24).  
2019.6 Hidetoshi Katori, Magic conditions for optical lattice clocks to operate at 10-19 uncertainty, CLEO/EUROPE-EQEC(Germany: 2019/6/23).  
2019.4 Hidetoshi Katori, Current Status of Optical Lattice Clocks at RIKEN & UT, IFCS-EFTE2019(USA: 2019/4/14).  
2018 Invited Speech
2019.3 Masao Takamoto, Ichiro Ushijima, Hidetoshi Katori, Geopotential measurements with synchronously linked optical lattice clocks, American Physical Society March Meeting 2019(USA: 2019/3/8).  
2019.3 Hidetoshi Katori, Magic conditions for optical lattice clocks to operate at 10-19 uncertainty, The 11th International Workshop on Fundamental Physics Using Atoms(Japan: 2019/3/3).  
2019.2 Hidetoshi Katori, Magic conditions for optical lattice clocks to operate at 10-19 uncertainty, Kavli IPMU Visions for table-top dark matter experiments(Japan: 2019/2/26).  

Conference(gloval)

2020 Conference
2021.3 N. Ohmae, M. Takamoto, I. Ushijima, T. Yahagi, K. Kokado, H. Shinkai, and H. Katori , Transportable optical lattice clocks to test gravitational redshift in a broadcasting tower, 55th Rencontres de Moriond 2021 on Gravitation(Online: 2021/3/9).
2021.3 Ichiro Ushijima, Transportable optical lattice clocks with 18-digit precision, TCFS-Workshop(Online: 2021/3/9).
2020.12 Yoshiyuki Tanaka, V. Klemann, Z. Martinec, Estimating the effects of laterally heterogeneous elasticity on coseismic deformation –a rotationally symmetric case, 2020 American Geophysical Union Fall Meeting(Online: 2020/12/8).
2020.12 Yoshiyuki Tanaka, Relativistic geodesy using optical lattice clock and its application to seismological and volcanological studies, International Workshop on Forefront Optical Lattice Clocks: from Curiosity-Driven Research to Real-World Applications(Japan: 2020/12/3).
2020.12 Tetsuomi Sogawa, Ultrastable cascaded optical frequency distribution towards telecom-fiber-based optical lattice clock network, International Workshop on Forefront Optical Lattice Clocks: from Curiosity-Driven Research to Real-World Applications(Japan: 2020/12/3).
2020.12 Hidetoshi Katori, Optical Lattice Clocks: Choice of atomic elements for science and practicality, International Workshop on Forefront Optical Lattice Clocks: from Curiosity-Driven Research to Real-World Applications(Japan: 2020/12/3).
2020.7 N. Nemitz, M. Sekido, K. Takefuji, H. Ujihara, M. Tsusumi, E. Kawai, K. Namba, Y. Okamoto, R. Takahashi, J. Komuro, R. Ichikawa, H. Hachisu, H. Ishijima, T. Ido, J. Leute, G. Petit, F. Perini, M. Negusini, G. Maccaferri, R. Ricci, M. Roma, M. Pizzocaro, F. Bregolin, P. Barbieri, C. Clivati, A. Mura, F. Levi, D. Calonico, Intercontinental optical clock comparison by broadband VLBI, International Frequency Control Symposium(Online: 2020/7/23).
2020.7 Takumi Kobayashi, Nearly continuous operation of an Yb optical lattice clock towards contribution to the International Atomic Time, IEEE IFCS-ISAF 2020(Online: 2020/7/19).
2020.5 Yoshiyuki Tanaka, Yosuke Aoki and Ryuichi Nishiyama, Geodetic determination of the gravitational potential difference for the optical lattice clock comparison in the Kanto region in Japan, European Geosciences Union General Assembly 2020(Online: 2020/5/7).
2019 Conference
2019.12 Tanaka, Y., V. Klemann, Z. Martinec, Estimating the effects of laterally heterogeneous elasticity and density structures on surface loading -a rotationally symmetric case, 2019 American Geophysical Union Fall Meeting(USA: 2019/12/13).
2019.7 Yoshiyuki Tanaka, Yuichi Imanishi, and Yoshiaki Tamura, Possible applications of optical lattice clock to crustal deformation monitoring, 27th IUGG General Assembly (Canada: 2019/7/14).
2019.7 Tomoya Akatsuka, Takashi Goh, Hiromitsu Imai, Katsuya Oguri, Atsushi Ishizawa, Ichiro Ushijima, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori, Toshikazu Hashimoto, Hideki Gotoh, and Tetsuomi Sogawa, Cascaded optical fiber link using PLC-based laser repeater stations, International Conference on Laser Spectroscopy (ICOLS2019)(New Zealand: 2019/7/8).
2018 Conference
2018.12 Yoshiyuki Tanaka, V. Klemann, Z. Martinec, Effects of laterally heterogeneous elastic structures on surface loading –a preliminary result for a rotationally symmetric spherical earth model, 2018 American Geoiphysical Union Fall Meeting(USA: 2018/12/10).

Book and Article

2020 Book and Article
2020.12 RIKEN Center for Advanced Photonics and Cluster for Pioneering Research, Scientists use Tokyo Skytree to test Einstein’s theory of general relativity, riken english channel.
2020.7 Masao Takamoto, Ichiro Ushijima, Noriaki Ohmae, Toshihiro Yahagi, Kensuke Kokado, Hisaaki Shinkai and Hidetoshi Katori, Einstein put to the test in Tokyo, U-Tokyo ARTICLES.

Prize

2021 Prize
2021.9 Professor Katori of the program manager,
   Received the
     "Breakthrough Prize in Fundamental Physics". ・Press release from the Breakthrough Prize
・Reason for awardn
2020 Prize
2021.3 Dr. Takamoto, assistant program manager,
   Received the
     "3rd (2020) Teruo Hiruma Optical Science Award". ・Press release from Research Foundation for Opto-Science and Technology(Japanese)
・Press release from RIKEN(Japanese)

2020.12 Professor Katori of the program manager,
   Received the
     "Micius Quantum Prize 2020". ・Press release from the Micius Quantum Foundation
・Website of the Micius Quantum Foundation
2020.9 Professor Katori of the program manager,
   Received the
     "Hattori Foundation 90th Anniversary Special Award". ・The Hattori Foundation website (Japanese)
・The University of Tokyo Press Release Site (Japanese)

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