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My Travels in Spring and Summer 2019granite.phys.s.u-tokyo.ac.jp/michimura/...Signal Bandwidth...
Transcript of My Travels in Spring and Summer 2019granite.phys.s.u-tokyo.ac.jp/michimura/...Signal Bandwidth...
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My Travels in
Spring and Summer 2019
Yuta MichimuraDepartment of Physics, University of Tokyo
August 8, 2019Ando Lab Seminar
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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
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TianQin Summer
School 2019
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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)
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马怡秋 Yiqiu MaThis building is under construction (~Fall 2019)
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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
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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
7World’s second longest lecture building
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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
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By Hsien-Chi Yeh
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结业式
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GR22 and Amaldi13
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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
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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
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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
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Darkon 2019
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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
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Dark Matter Ranking• Believe if theorists say it is
interesting, but don’t believe if
theorists say it is not interesting
16濱口幸一
郡和範
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Axions and Gravitational Waves• Axions can be detected with gravitational wave detectors
17早田次郎
arXiv:1904.09143
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KIW6
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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
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Atom Interferometer at WIPM• Underground, 12 m tall
• Test of equivalence principle
• Also prototype for ZAIGA(Zhaoshan Long-baseline
Atom Interferometer
Gravitation Antenna)
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华中科技大学引力中心 Visit• Torsion pendulum and atom interferometer experiments in
underground facility
• Equivalence principle,
Square inverse law,
Gravitational constant,
Photon mass…
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SoundproofMagnetic shieldVibration isolated room
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G Measurement at 12 ppm
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Rotary connector
Compensatelocal gravity field
Q. Li+, Nature 560, 582 (2018)
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CODATA 2018• 6.67430(15) x 10-11 m3 kg-1 s-2
• 6.67408(31) x 10-11 m3 kg-1 s-2 (CODATA-2014)
23Q. Li+, Nature 560, 582 (2018)
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QFilter Workshop
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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
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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
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• 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
Institutes
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Nobuyuki Matsumoto
(Tohoku University)
Kazuyuki Takeda
(Kyoto University)
Yuta Michimura
(University of Tokyo)
Koji Usami
(RCAST)
Kentaro Somiya
(Tokyo Institute
of Technology)
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Signal Gain Enhancement• At TT
• Modify optical spring frequency using a non-linear
crystal in signal recycling cavity
• Demonstration experiment on-going
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Optical spring frequency shifts
due to parametric amplificationOptical resonance
K. Somiya+, Phys. Lett. A 380, 5 (2016)
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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
30H. Miao+, PRL 115, 211104 (2015)
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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
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30 μg micropillar
0.2-1 mg levitated mirror
7 mg suspended mirror10 mg torsion bar
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Gravitational Wave Detection• At LKB, LAL, TT and UT
• Sensitivity enhancement of GW detectors
- parametric signal amplification
- bandwidth enhancement
- frequency dependent squeezing
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S S Y Chua+, CQG 31, 183001 (2014)
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Nuclear Magnetic Resonance• At RCAST and Kyoto
• Readout NMR signal optomechanically to increase
the sensitivity
• Demonstration done, working on further sensitivity
enhancement
33K. Takeda+, Optica 5, 152 (2018)
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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)
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Workshop Participants
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• 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
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Upcoming Travel Plans