## Selected invited talks

##### 2018

Hidetoshi Katori:
“Optical Lattice Clocks : Reading the 18^{th} Decimal Place of Frequency” SPIE Photonics West 2018 (2018/1/31)

##### 2017

Hidetoshi Katori:

“Optical Lattice Clocks: Seeking for a Future Second” JAPAN-DENMARK 150^{TH} Anniversary Year of Diplomatic Relationship, Photonics Creating the Future (2017/11/16)

Hidetoshi Katori:

“Connecting optical lattice clocks at 10^{-18} uncertainty” The 24th Congress of the International Commission for Optics, ICO-24 (2017/8/23)

Hidetoshi Katori:

“Optical lattice clocks and their applications”

International Conference on Laser Spectroscopy, ICOLS 2017 (2017/7/4)

Hidetoshi Katori:

(Keynote Address) “Reading 18th decimal places of time with optical lattice clocks: miniaturization and new application” MEMS Engineer Forum, MEF (2017/4/27)

Hidetoshi Katori:

“Connecting optical lattice clocks at 10^{-18} uncertainly” geo-Q General Assembly (2017/2/23)

Hidetoshi Katori:

“Optical Lattice Clocks: Reading the 18^{th} decimal place of frequency” 55^{th} International Winter Meeting on Nuclear Physics (2017/1/26)

##### 2016

Hidetoshi Katori:

(Plenary talk) “Optical Lattice Clocks:Seeking for a New Second” International Symposium on Optomechatronic Technology (ISOT 2016 Itabashi Tokyo) (2016/11/7)

Hidetoshi Katori:

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

Varying Constants and Fundamental Cosmology, VARCOSMOFUN’16

(2016/9/13)

Hidetoshi Katori:
“Frequency ratios of optical lattice clocks at the 17^{th} decimal place”
The 25th International Conference on Atomic Phyics ICAP 2016
(2016/7/25)

Hidetoshi Katori:
“Frequency ratios of optical lattice clocks at the 17^{th} decimal place”
47th Annual Meeting of the APS Divison of Atomic, Molecular and Optical Physics (2016/5/26)

##### 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)

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)

Hidetoshi Katori:

“Seeking for a New Second”,

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

Hidetoshi Katori:

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

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

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)

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)

Hidetoshi Katori:

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

CLEO 2015 (2015/5/15)

##### 2014

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”,

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

Hidetoshi Katori:

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

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

Hidetoshi Katori:

“Frequency comparison of cryogenic optical lattice clocks”,

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

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)

##### 2013

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)

Hidetoshi Katori:

“Precise Comparisons of Optical Lattice Clocks”,

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

Hidetoshi Katori:

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

Quantum Optics Ⅷ (2013/5/30)

Hidetoshi Katori:

“Precise Frequency Comparisons of Optical Lattice Clocks”,

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

Hidetoshi Katori:

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

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

Hidetoshi Katori:

“Optical Lattice clocks at Riken”,

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

Hidetoshi Katori:

"Optical Lattice Clocks at Riken- efforts for developing accurate(10-18) and stable clocks with long term operation for future applications-",

The 72nd Okazaki Conference on "Ultimate Control of Coherence" (2013/1/8)

##### 2012

Hidetoshi Katori:

"Clocks as a tool for exploring the spacetime curvature",

ASI Science Dojo (2012/11/29)

Hidetoshi Katori:

“Optical lattice clocks at Riken”,

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

Hidetoshi Katori:

“Optical Lattice clocks and their applications”,

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

Hidetoshi Katori:

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

2012 IEEE International Frequency Control Symposium (2012/5/22)

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)

Hidetoshi Katori:

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

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

##### 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)

Masao Takamoto:

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

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

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency Comparison of Optical Lattice Clocks”,

SPIE (2011/9/12)

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)

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)

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)

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)

##### --2010

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Frequency comparison of optical lattice clocks”,

INRIM (2010/12/1)

Hidetoshi Katori:

"17-digits' Frequency Comparison of "Optical Lattice Clocks" at the Standard Quantum Limit",

QIT23 (2010/11/6)

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)

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)

Masao Takamoto, Tetsushi Takano, and Hidetoshi Katori:

“Opitcal lattice clock”,

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

Hidetoshi Katori:

“Optical Lattice Clocks & Frequency Comparisons”,

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

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)

Hidetoshi Katori:

“Optical Lattice Clocks & Frequency Comparisons”,

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

Hidetoshi Katori:

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

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

Hidetoshi Katori:

“Five years’ progress in optical lattice clocks”,

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