## International conference

##### 2016

Masao Takamoto:

"Precision metrology with optical lattice clocks",

UBIAS International Academia Nagoya Workshop (2016/3/9) 【Oral】

Hidetoshi Katori:

"Frequency ration of optical lattice clocks at the 17th decimal place",

LEAP2016 (2016/3/8 ) 【invited】

Hidetoshi Katori:

"Frequency ration of optical lattice clocks at the 17th decimal place",

International Conference on Quantum Optics 2016 (2016/2/26 ) 【invited】

b.p. Tetsushi Takano (Hidetoshi Katori):

"Remote frequency comparison of cryogenic optical lattice clocks",

The 6th International Workshop on Ultracold Group II atoms (2016/2/23) 【invited】

##### 2015

Hidetoshi Katori:

“Frequency Comparisons of Sr, Yb and Hg based optical lattice clocks in the lab and between the labs”

8^{th} Symposium on Frequency Standards and Metrology 2015 (2015/10/13) (invited)

N. Nemitz, T. Ohkubo, M. Takamoto, I. Ushijima, M. Das, N. Ohmae, H. Katori:

“Measuring the Yb/Sr clock frequency ratio with cryogenic optical lattice clocks”,

8^{th} Symposium on Frequency Standards and Metrology 2015 (2015/10/12,13) (Poster)

Hidetoshi Katori:

“Frequency ratios of optical lattice clocks at the 17^{th} decimal place”,

12^{th} US-Japan Seminar on many body quantum systems (2015/9/22)(invited)

Tetsushi Takano, Ichiro Ushijima, Masao Takamoto, Atsushi Yamaguchi, Tomoya Akatsuka, and Hidetoshi Katori:

“Remote frequency comparison of cryogenic optical lattice clocks”,

12^{th} US-Japan Seminar on many body quantum systems (2015/9/21) (Poster)

Shoichi Okaba:

“Super-radiance in HC-PCF”,

12^{th} US-Japan Seminar on many body quantum systems (2015/9/21) (Poster)

Hidetoshi Katori:

“Seeking for a New Second”,

iNOW2015, International Nano Optoelectronics Workshop (2015/8/3) (invited)

Hidetoshi Katori:

“Lattice Clocks -from the beginning to the latest-”,

OCS2015 , School on Optical Clocks (2015/7/3) (invited)

Hidetoshi Katori:

“Frequency ratios of Sr, Yb, and Hg based optical lattice clocks and their applications”,

ICOLS2015, 22nd International Conference on Laser Spectroscopy (2015/6/30) (invited)

N. Ohmae, K. Yamanaka, I. Ushijima, M. Takamoto, K. Katori:

“Frequency ratio measurement of Hg and Sr optical lattice clocks”,

2015 Conference on Lasers and Electro-Optics Europe & the European Quantum Electronics Conference (2015/6/22) (Oral)

Hidetoshi Katori:

“Frequency Comparison of Optical Lattice Clocks and its Applications”,

Gordon Research Conference on Atomic Physics: From Ultracold to Strongly Interacting Quantum Systems (2015/6/18) (invited)

Masao Takamoto:

“Frequency comparison of cryogenic Sr optical lattice clocks at 10^{-18}”,

BIT's 4th Annual World Congress of Advanced Materials-2015 (WCAM-2015)
(2015/5/27) (invited)

Hidetoshi Katori:

“Frequency comparisons of Sr, Yb, and Hg based optical lattice clocks and their applications”,

CLEO 2015 (2015/5/15) (invited)

N. Nemitz, T. Ohkubo, M. Takamoto, I. Ushijima, M. Das, N. Ohmae, H. Katori:

“Measuring the Yb/Sr clock frequency ratio with cryogenic optical lattice clocks”,

2015 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (2015/4/14) (Oral)

##### 2014

Hidetoshi Katori:

“Optical lattice clock for fundamental physics: A bridge from ion to atom physics”,

Trapped Charged Particle and Fundamental Physics TCP school (2014/11/29) (invited)

Hidetoshi Katori:

“Optical Lattice Clocks as Quantum Sensors for Space-time and Fundamental Physics”,

11th Asian International Seminar on Atomic and Molecular Physics (AISAMP11) (2014/10/10) (Plenary)

Hidetoshi Katori:

“Reading 18th Decimal Places of Time with Optical Lattice Clocks”,

2014URSI 日本電波科学会議(URSI-JRSM2014) (2014/9/8) (invited)

Hidetoshi Katori:

“Optical lattice clocks-sensing the space-time curvature”,

Physics Colloquium, Universität Tübingen (2014/7/16)(invited)

Hidetoshi Katori:

“Frequency comparison of cryogenic optical lattice clocks”,

New Ideas in low-Energy Tests of Fundamental Physics (2014/6/16) (invited)

Hidetoshi Katori, Ichiro Ushijima, and Masao Takamoto:
“Frequency Comparison of Cryogenic Optical Lattice Clocks Between Riken and the University of Tokyo”,

2014 IEEE International Frequency Control Symposium (2014/5/21) (Oral)

Hidetoshi Katori:
“Frequency comparison of cryogenic optical lattice clocks in a lab and inter labs”,

2014 Frequency Control Symposium (2014/5/19) (invited)

Hidetoshi Katori:

“Frequency comparison of cryogenic Sr optical lattice clocks at 10^{-18}”,

7th International Workshop on Fundamental Physics using Atoms 2014 (FPUA2014) (2014/3/16) (invited)

Tomoya Akatsuka, Hitomi Ono, Keitaro Hayashida, Tetsushi Takano, Atsushi Yamaguchi, Masao Takamoto, Ichiro Ushijima, and Hidetoshi Katori:

“Coherent frequency transfer of a strontium optical lattice clock via a 30-km-long optical fiber”,

7th International Workshop on Fundamental Physics using Atoms 2014 (FPUA2014) (2014/3/14-15) (Poster)

Hidetoshi Katori:

“Frequency Comparison of Ensemble of Optical Lattice Clocks: Identifying the 18th decimal places”,

FIRST International Symposium on “Topological Quantum Technology” (2014/1/29) (invited)

##### 2013

Hidetoshi Katori:

“時空のゆがみを見る光格子時計”,

日本光学会次学術講演会 Optics & Photonics Japan 2013 (2013/11/12) (Plenary)

Masao Takamoto, Ichiro Ushijima, Takuya Ohkubo, Manoj Das, Nils Nemitz, and Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

Modern Problems of Laser Physics (MPLP 2013) (2013/8/25) (invited)

Tomoya Akatsuka, Hitomi Ono, Keitaro Hayashida, Kuniya Araki, Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“A 30-km-long optical fiber link for frequency comparison between distant strontium optical lattice clocks”,

2013 IEEE International Frequency Control Symposium (2013/7/25) (Oral)

Ichiro Ushijima, Takuya Ohkubo, Manoj Das, Masao Takamoto, and Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

2013 IEEE International Frequency Control Symposium (2013/7/24) (Oral)

Ichiro Ushijima, Takuya Ohkubo, Manoj Das, Masao Takamoto, and Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

2013 IEEE International Frequency Control Symposium (2013/7/22-25) (Poster)

N.Ohmae, K.Yamanaka, M.Takamoto, and H.Katori:

“Development of Hg optical lattice clocks”,

The 12th Asia Pacific Physics Conference of AAPPS, ASEPS3 The third Asia-Europe Physics Summit (2013/7/17) (Oral)

Tomoya Akatsuka, Hitomi Ono, Keitaro Hayashida, Kuniya Araki, Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Optical fiber link for frequency comparison between strontium optical lattice clocks operating at distant laboratories”,

The 12th Asia Pacific Physics Conference of AAPPS, ASEPS3 The third Asia-Europe Physics Summit (2013/7/17) (Poster)

Ichiro Ushijima, Manoj Das,Takuya Ohkubo,Masao Takamoto, and Hidetoshi Katori:

“Evaluation of blackbody radiation shift with ^{87}Sr optical lattice clocks”,

The 12th Asia Pacific Physics Conference of AAPPS, ASEPS3 The third Asia-Europe Physics Summit (2013/7/17) (Poster)

Hidetoshi Katori:

“Precise Comparisons of Optical Lattice Clocks”,

CLEO-PR&OECC/PS 2013 Workshop on C-Special : Photon Frontier Network (2013/6/30) (invited)

Kazuhiro Yamanaka, Noriaki Ohmae, Masao Takamoto, and Hidetoshi Katori:

“Development of Hg optical lattice clock at RIKEN”,

The 21st International Conference on Laser Spectroscopy (2013/6) (Poster)

Masao Takamoto, Ichiro Ushijima, Manoj Das, Takuya Ohkubo, Nils Nemitz, and Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

The 21st International Conference on Laser Spectroscopy (2013/6) (Poster)

Hidetoshi Katori:

“Development of Optical Lattice Clocks Aiming at 10^{-18} Uncertainties”,
Quantum Optics Ⅷ (2013/5/30) (invited)

Hidetoshi Katori:

“Precise Frequency Comparisons of Optical Lattice Clocks”,

C3QS:Coherent Control of Complex Quantum Systems (2013/5/8) (invited)

Hidetoshi Katori:

“Optical lattice clocks:A decade after Yatsugatake US-Japan seminar”,

US-JAPAN Joint seminar 2013 (2013/4/9) (invited)

Takuya Ohkubo, Ichirou Ushijima, Manoj Das, Masao Takamoto, and Hidetoshi Katori:

“Evaluation of blackbody radiation shift of strontium optical lattice clock”,

US-JAPAN Joint seminar 2013 (2013/4/5,10) (Poster)

Shouichi Okaba,Tethushi Takano, and Hidetoshi Katori:

“Precision spectroscopy of atoms inside hollow core fiber”,

US-JAPAN Joint seminar 2013 (2013/4/5,10) (Poster)

Tomoya Akatsuka, Hitomi Ono, Keitaro Hayashida, Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“A 30-km-long optical fiber link between Riken and University of Tokyo for frequency comparison between remote optical lattice clocks”,

NICT Workshop on the optical frequency standards -Recent progress and future prospect- (2013/2/7) (Poster)

Hidetoshi Katori:

“Optical Lattice clocks at Riken”,

NICT Workshop on the optical frequency standards -Recent progress and future prospect- (2013/2/7) (invited)

##### 2012

Ichiro Ushijima, Das Manoj, Takuya Ohkubo, Tetsushi Takano, Masao Takamoto, Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

GCOE International Symposium on Physical Sciences Frontier (2012/12/8) (Poster)

香取秀俊:

“Development of Optical Lattice Clocks Aiming at 10^{-18} Uncertainties”,

GCOE International Symposium on Physical Sciences Frontier (2012/12/8) (Oral)

Manoj Das, Ichiro Ushijima, Takuya Ohkubo, Masao Takamoto, and Hidetoshi Katori:

“Development of Strontium Optical Lattice Clocks: Towards frequency uncertainty of 10^{-18}”,

8th International conference on Advances in Metrology (2012/11/7)

Tomoya Akatsuka, Hitomi Ono, Masao Takamoto, Tetsushi Takano, Noriaki Ohmae, Manoj Das, Ichiro Ushijima, Takuya Ohkubo, and Hidetoshi Katori:

“A 30-km optical fiber link for frequency comparison between remote optical lattice clocks”,

The 5th International workshop on ultracold groupⅡatoms (2012/10/11) (Poster)

N. Ohmae, Y. Aso, A. Shoda, T. Ushiba, M. Takamoto, and H. Katori:

“Stable lasers toward 10^{-17} stability with cryogenic cavity and 1-m-long cavity”,

The 5th International workshop on ultracold groupⅡatoms (2012/10/11) (Poster)

Masao Takamoto, Ichiro Ushijima, Manoj Das, Takuya Ohkubo, and Hidetoshi Katori:

“Optical lattice clocks with ^{87}Sr in a cryogenic environment”,

The 5th International workshop on ultracold groupⅡatoms (2012/10/11) (Poster)

Kazuhiro Yamanaka, Noriaki. Ohmae, Pierre Thoumany, Masao Takamoto, and Hidetoshi Katori:

“Optical lattice clock based on neutral Hg at RIKEN”,

The 5th International workshop on ultracold groupⅡatoms (2012/10/11) (Poster)

Hidetoshi Katori:

“Optical lattice clocks at Riken”,

The 5th International workshop on ultracold group Ⅱatoms (2012/10/10) (invited)

Hidetoshi Katori:

"Optical Lattice clocks and their applications",

6th Asian Summer School and Symposium on Laser-Plasma Acceleration and Radiation (2012/9/4) (invited)

Hidetoshi Katori:

“Prospects for Frequency Comparison of Sr and Hg Based Optical Lattice Clocks Toward 10^{-18} Uncertainties”,

2012 IEEE International Frequency Control Sumposium (2012/5/22) (invited)

Hidetoshi Katori:

“Synchronous frequency comparison of optical lattice clocks to approach the quantum limit”,

Shanghai-Tokyo Advanced Research symposium on Ultrafast Intense Laser Science (2012/5/17) (invited)

Hidetoshi Katori:

“Prospects for Frequency Comparison of Optical Lattice Clocks Toward 10^{-18} Fractional Uncertainties”,

2012 European Frequency and Time Forum (2012/4/22) (invited)

##### 2011

Hidetoshi Katori:

“光格子時計/Optical lattice clocks and future roles for clocks”,

Germany-Japan Round Table From the early universe to the evolution of life (2011/12/3) (invited)

Masao Takamoto:

“Frequency comparison of optical lattice clocks near the quantum limit”,

Cold Antimatter & High Precision Physics (pbar11) (2011/11/29) (invited)

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency Comparison of Optical Lattice Clocks”,

SPIE (2011/9/12) (invited)

H. Katori, T. Takano, and M. Takamoto:

“Synchronous frequency comparison of optical lattice clocks to approach the quantum limit”,

URSI General Assembly and Scientific Symposium(URSIGASS2011) (2011/8/19) (invited)

Hidetoshi Katori, Tetsushi Takano, and Masao Takamoto:

“Synchronous Frequency Comparison of Optical Lattice Clocks to approach the Quantum Limit”,

487. Wilhelm and Else Heraeus Seminar Astrophysics, Clocks and Fundamental Constants (2011/7/20) (invited)

Hidetoshi Katori:

“Synchronous Frequency Comparison of Optical Lattice Clocks to approach the Quantum Limit”,

The 20th International Conference on Laser Spectroscopy (ICOLS 2011) (2011/5/30) (invited)

Noriaki Ohmae, and Norikatsu Mio:

“The High Power Light Source for LCGT”,

Gravitational Waves Advanced Detectors Workshop (GWADW 2011) (2011/5/23) (Oral)

T. Ido, M. Fujieda, A. Yamaguchi, M. Kumagai, H. Hachisu, and S. Nagano, T. Takano, M. Takamoto, and H. Katori:

“Optical direct comparison of two ^{87}Sr lattice clocks using a >50km fiber link”,

CLEO/QELS: 2011 the Conference on Lasers and Electro-Optics (2011/5/1) (Oral)

Hidetoshi Katori:

“Frequency Comparison of Optical Lattice Clocks near the Quantum Limit”;

ERATO Macroscopic Quantum Control Conference on ltracold Atoms and Molecules (UCAM2011) (2011/1/25) (invited)

A. Yamaguchi, M. Kumagai, M. Fujieda, N. Shiga, S. Nagano, H. Hachisu, Y. Koyama, T. Ido, T. Takano, M. Takamoto, and H. Katori:

“Optical direct comparison of two ^{87}Sr lattice clocks using a > 50 km fiber link”,

ERATO Macroscopic Quantum Control Conference on ltracold Atoms and Molecules (UCAM2011) (2011/1/24) (Poster)

Kazuhiro Yamanaka, Hidekazu Hachisu, Tadashi Nonaka, Saneyuki Imamura, Masao Takamoto, and Hidetoshi Katori:

“Optical lattice clock with neutral mercury atoms”,

ERATO Macroscopic Quantum Control Conference on ltracold Atoms and Molecules (UCAM2011) (2011/1/24) (Poster)

Tetsushi Takano, Masao Takamoto, and Hidetoshi Katori:

“Improvement of isotope shift measurement using two optical lattice clocks”,

ERATO Macroscopic Quantum Control Conference on ltracold Atoms and Molecules (UCAM2011) (2011/1/24) (Poster)

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency comparison of two optical lattice clocks with synchronous interrogations”,

ERATO Macroscopic Quantum Control Conference on ltracold Atoms and Molecules (UCAM2011) (2011/1/24) (Poster)

##### --2010

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency comparison of optical lattice clocks”,

INRIM (2010/12/1) (invited)

Hidetoshi Katori:

“17-digits’ Frequency Comparison of Optical Lattice Clocks near the Quantum Limit”,

The third international conference on “Updating Quantum Cryptography and Communications” (2010/10/20) (invited)

Hidekazu Hachisu, Masao Takamoto, and Hidetoshi Katori:

“Measurement of the Blackbody shift using a cryogenic Sr Optical lattice clock”,

2010 Asia-Pacific Radio Science Conference (AP-RASC'10), A3b-5 (2010/9/24) (invited)

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Opitcal lattice clock”,

International Conference on Coherent and Nonlinear Optics (ICONO 2010)IWA3 (2010/8/25) (invited)

Tetsushi Takano, Masao Takamoto, and Hidetoshi Katori:

“Frequency comparison between two optical lattice clocks towards 10^{-16} uncertainty”,

22nd International conference on Atomic Physics (2010/7/29) (Poster)

Koji Hashiguchi, Hidekazu Hachisu, Yoshiaki Nakajima, Hajime Inaba, Masao Takamoto, and Hidetoshi Katori:

“Laser cooling of Sr atoms on the ^{3}P_{2}-^{3}D_{3} transition at 2.9 mm”,

22nd International conference on Atomic Physics (2010/7/27) (Poster)

Hidetoshi Katori:

“Optical Lattice Clocks & Frequency Comparisons”,

22nd International conference on Atomic Physics (2010/7/27) (invited)

Tetsushi Takano, Hidekazu Hachisu, Masao Takamoto, and Hidetoshi Katori:

“Optical lattice clock”,

Variation of fundamental constants and violation of fundamental symmetries P, T(EDM), CPT, Lorentz invariance (2010/7/24) (invited)

Hidetoshi Katori:

“Optical Lattice Clocks & Frequency Comparisons”,

2010 Conference on Precision Electromagnetic Measurements (CPEM) (2010/6/15) (invited)

Hidetoshi Katori:

“Optical Lattice Clocks toward 10^{-17} Uncertainty”,

CLEO/QELS: 2010 Laser Science to Photonic Applications (2010/5/17) (invited)

Hidetoshi Katori:

“Five years’ progress in optical lattice clocks”,

2010 International Symposium on Physics of Quantum Technology (2010/4/9) (invited)

Ichiro Ushijima, Isao Yoshimine, Tetsushi Takano, Masao Takamoto, and Hidetoshi Katori:

“Laser and evaporative cooling toward Fermi Degenerate ^{87}Sr”,

2010 International Symposium on Physics of Quantum Technology, 8TH-14 (2010/4/8) (Poster)

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency comparison between two optical lattice clocks”,

2010 International Symposium on Physics of Quantum Technology, 8TH-14 (2010/4/8) (Poster)

Tetsushi Takano, Kenichiro Totsuka, Masao Takamoto, and Hidetoshi Katori:

“Improvement of frequency uncertainty of 3D bosonic optical lattice clock towards 10^{-16} uncertainty”,

2010 International Symposium on Physics of Quantum Technology, 8TH-14 (2010/4/8) (Poster)

Hidekazu Hachisu, Masao Takamoto and Hidetoshi Katori:

“Measurement of the blackbody radiation shift using a cryogenic Sr optical lattice clock”,

2010 International Symposium on Physics of Quantum Technology, 8TH-14 (2010/4/8) (Poster)

Koji Hashiguchi, Hidekazu Hachisu, Yoshiaki Nakajima, Hajime Inaba, Masao Takamoto. and Hidetoshi Katori:

“Magneto-Optical Trapping of Sr atoms on the ^{3}P_{2}-^{3}D_{3} transition at 2.9 mm”,

2010 International Symposium on Physics of Quantum Technology, 8TH-12 (2010/4/8) (Poster)