My Travels in Spring and Summer 2019 Yuta Michimura Department of - PowerPoint PPT Presentation

Ando Lab Seminar August 8, 2019 My Travels in Spring and Summer 2019 Yuta Michimura Department of Physics, University of Tokyo

My Travels • March 18-26: QFilter Workshop @ Paris • May 20-21: Kamioka • June 18: ICRR Seminar @ Kashiwa • June 19-25: KIW6 @ Wuhan • June 30: FF meeting @ Nagoya • July 1: KAGRA Extended Chief Meeting @ U Toyama • July 2-3: Kamioka • July 5-6: Darkon 2019 @ Waseda • July 8-14: GR22 and Amaldi13 @ Valencia • July 23-27: TianQin Summer School @ Zhuhai • July 29: KAGRA Extended Chief Meeting @ U Toyama • July 30-31: Kamioka • August 5: Yorita Lab Seminar @ Waseda 2

TianQin Summer School 2019

TianQin Summer School 2019 • 中山大学天琴中心 2019 年引力波暑期学校 http://tianqin.sysu.edu.cn/zh-hans/content/421 • Two weeks, 10 lecturers (~4 slots each) This building is under 马 怡秋 Yiqiu Ma construction (~Fall 2019) 4

TianQin Research Center • Direct flight from 羽田 to 広州 (Guangzhou) • Two hours drive to 珠海 (Zhuhai) • Very nice city with mountains and beaches • 中山大学 campus itself is also very nice 5

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Lectures • I gave lectures on interferometry and quantum noise calculations (and beauty of Fabry-Perot) • Yiqiu gave another lectures on quantum noise calculations from Hamiltonian afterwards • Some students are very active and asked me many questions World’s second longest 7 lecture building

天琴 计 划激光測距台站 Visit • Lunar laser ranging facility • Facility was very nice and new • Already produced some results By Hsien-Chi Yeh 8

结业 式 9

GR22 and Amaldi13

GR22 and Amaldi13 • 22nd International Conference on General Relativity and Gravitation • 13th Edoardo Amaldi Conference on Gravitational Waves https://www.gr22amaldi13.com/ • I gave KAGRA upgrade talk • More than 1000 participants, ~10 parallel sessions • I was mostly attending - Experimental Gravitation - Measurements of G - LISA sessions 11

Some Interesting Talks • Experimental Studies Of Gravity With Slow Neutrons, Kitaguchi, Masaaki - Neutron interferometer (can be also used for GW detection?) • Newton-V Experiment: Test Of Gravitational Inverse Square Law At A Micrometer Scale Shibaguchi, Hiroyuki - Started to use interferometers instead of cameras • Experimental Search For New Gravity-Like Interactions In The Nanometer Range, Kamiya, Yoshio - Using angular distribution of neutron scattering off Xe gas • A New Class Of Experiments On The True Relativistic Nature Of The One-Way Propagation Of Light Unnikrishnan. C. S. • Space+Ground Multiband Detections. How Many?, Gerosa, D - 3-12 stellar mass BBHs / 4 years (LISA will limit the observation) 12

Some Interesting Talks • Cosmic Explorer, Matt Evans - CE1 (room temperature) and CE2 (Voyager type) • Gravimetry on the milliscale - 100mg as a source mass, Tobias Westphal - 100 mg-100 mg dumbbell torsion pendulum, 6 mHz resonance, 0.2 pN/rtHz below 0.1 mHz, 100 mg source mass, UV LED discharge, factor of 5 to observe gravitational force (but repulsive) • Update On The Work At Nist On The Determination Of Newton’S Constant, G, Using The Bipm 2013 Apparatus, Clive Speake - Use sapphire source mass to confirm BIPM 2013 result • Space-Based Gravitational Wave Detector Simulation Architecture For Noise Coupling Analysis And System Optimization — Current Status And Future Development, Zhang Y.Z. - Simulation development in China 13

Darkon 2019

Darkon 2019 • ダークマターの懇談会 2019 • Slides available at http://www.kylab.sci.waseda.ac.jp/darkon2019/ • More than 100 people attended • Many talks on both theory and experiment • I talked about DANCE and axion dark matter search with interferometric gravitational wave detector • Dark matter field looks chaotic and experiments look tough 15

Dark Matter Ranking • Believe if theorists say it is interesting, but don’t believe if theorists say it is not interesting 郡和範 濱口幸一 16

Axions and Gravitational Waves • Axions can be detected with gravitational wave detectors arXiv:1904.09143 早田次郎 17

KIW6

KIW6 • The 6th KAGRA International Workshop http://kiw6.csp.escience.cn/dct/page/1 • 中国科学院武 汉 物理与数学研究所 • Social event was very good Cycling at East Lake • Wuhan is famous for breakfast 19

Atom Interferometer at WIPM • Underground, 12 m tall • Test of equivalence principle • Also prototype for ZAIGA (Zhaoshan Long-baseline Atom Interferometer Gravitation Antenna) 20

华 中科技大学引力中心 Visit • Torsion pendulum and atom interferometer experiments in underground facility Soundproof Magnetic shield • Equivalence principle, Vibration isolated room Square inverse law, Gravitational constant, Photon mass… 21

Q. Li+, Nature 560, 582 (2018) G Measurement at 12 ppm Rotary connector Compensate local gravity field 22

CODATA 2018 • 6.67430(15) x 10 -11 m 3 kg -1 s -2 • 6.67408(31) x 10 -11 m 3 kg -1 s -2 (CODATA-2014) 23 Q. Li+, Nature 560, 582 (2018)

QFilter Workshop

QFilter Project • Manipulation of an optomechanically coupled oscillator using a quantum filter • ANR-JST joint research PI Antoine Heidmann (Laboratoire Kastler Brossel) - 0.54Million Euro - January 2019 – December 2024 PI Kentaro Somiya (Tokyo Institute of Technology) - 180Million Yen (~1.4Million Euro) - October 2018 – March 2024 25

Objectives • Optomechanics for signal gain and bandwidth enhancement • Proof of principle experiments - signal gain enhancement - signal bandwidth enhancement • Application of these techniques - Test of quantum mechanics - Gravitational wave detection - Nuclear magnetic resonance (NMR) detection 26

Institutes • LKB: Laboratoire Kastler Brossel • LAL: Laboratoire de l'Accélérateur Linéaire • LMA: Laboratoire des Matériaux Avancés • TT: Tokyo Institute of Technology • UT: University of Tokyo • RCAST: Research Center for Advanced Science and Technology, University of Tokyo • Kyoto: Kyoto University • Tohoku: Tohoku University 27

Nobuyuki Matsumoto (Tohoku University) Yuta Michimura (University of Tokyo) Kazuyuki Takeda (Kyoto University) Koji Usami (RCAST) Kentaro Somiya (Tokyo Institute 28 of Technology)

Signal Gain Enhancement • At TT • Modify optical spring frequency using a non-linear crystal in signal recycling cavity • Demonstration experiment on-going Optical spring frequency shifts Optical resonance due to parametric amplification 29 K. Somiya+, Phys. Lett. A 380, 5 (2016)

Signal Bandwidth Enhancement • At LKB • Bandwidth can be enhanced by compensating the phase delay using negative dispersion of a micro resonator • Micropillar (30 μg) can be used 30 H. Miao+, PRL 115, 211104 (2015)

Test of Quantum Mechanics • At LKB, UT and Tohoku • Test at various scales to look into classical- quantum boundary • Works for ground state cooling, standard quantum limit measurement on-going 30 μg micropillar 10 mg torsion bar 7 mg suspended mirror 0.2-1 mg levitated mirror 31

Gravitational Wave Detection • At LKB, LAL, TT and UT • Sensitivity enhancement of GW detectors - parametric signal amplification - bandwidth enhancement - frequency dependent squeezing S S Y Chua+, CQG 31, 183001 (2014) 32

Nuclear Magnetic Resonance • At RCAST and Kyoto • Readout NMR signal optomechanically to increase the sensitivity • Demonstration done, working on further sensitivity enhancement 33 K. Takeda+, Optica 5, 152 (2018)

QFilter Workshop • First occasion to meet collaborators face-to-face • Plan to have the workshop annually between France and Japan (next one is Kyoto in March 2020) • March 19-20: Workshop & tour at LKB (Paris) • March 21: Discussion & tour at LMA (Lyon) • March 22: Lab tour to LAL (Orsay) • March 25: Meet Matteo Barsuglia at APC (Paris) 34

Workshop Participants 35

Upcoming Travel Plans • August 19-20: Kamioka • August 21-24: KAGRA F2F @ U Toyama • September 9-13: TAUP2019 @ Toyama - DANCE talk • September 17-20: JPS meeting 2019 Fall @ Yamagata U - km-scale space GW detector talk • October 9-10: Soda Lab Seminar @ Kobe U - GW and Lorentz invariance talk • October 14-17: GWPAW2019 @ RESCEU - KAGRA upgrade poster • October 21-24: 4M-COCOS @ Fukuoka U - KAGRA status talk • November 8-10: 量子エレクトロニクス研究会 @ 山中寮 - GW detection and quantum technologies talk 36