Testing Macroscopic Quantum Mechanics (MQM) with Future GW Detectors A brief report of theoretical works by the LIGO-MQM discussion group: Albert Einstein Institute: Helge Müller-Ebhardt, and Roman Schnable Caltech: Yanbei Chen, Ting Hong, Kentaro Somiya, Kip Thorne and Huan Yang MIT: Thomas Corbitt, Nergis Mavalvala, and Christopher Wipf Moscow State University: Stefan Danilishin, and Farid Khalili UWA: Haixing Miao, Chunnong Zhao, and Zhongyang Zhang Haixing Miao University of Western Australia (UWA)
Testing Macroscopic Quantum Mechanics (MQM) with Future GW Detectors
Feb 24, 2016
Testing Macroscopic Quantum Mechanics (MQM) with Future GW Detectors . Haixing Miao . University of Western Australia (UWA). A brief report of theoretical works by the LIGO-MQM discussion group : Albert Einstein Institute : Helge Müller-Ebhardt , and Roman Schnable - PowerPoint PPT Presentation
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Testing Macroscopic Quantum Mechanics (MQM) with Future GW Detectors
A brief report of theoretical works by the LIGO-MQM discussion group:Albert Einstein Institute: Helge Müller-Ebhardt, and Roman Schnable
Caltech: Yanbei Chen, Ting Hong, Kentaro Somiya, Kip Thorne and Huan Yang
MIT: Thomas Corbitt, Nergis Mavalvala, and Christopher Wipf
Moscow State University: Stefan Danilishin, and Farid Khalili
UWA: Haixing Miao, Chunnong Zhao, and Zhongyang Zhang
Haixing Miao University of Western Australia (UWA)
We are not alone:-)
GWADW 17th May – 21st May, 2010
1
Caltech
UCSB LIGOMITViennaYale
From ng up to kg
Optomechanics:
LKB AEI CLIOUWA
>> Quantum-limited measurement of weak forces and beyond
Motivations
GWADW 17th May – 21st May, 2010
>> Quantum-to-classical transition
>> Quantum information with mechanical devices
2
How quantum a GW detector is?3
Order-of-magnitude estimate:
Detector sensitivity:
De Broglie wavelength:
How about thermal decoherence? --- It is just a matter of timing.
GWADW 17th May – 21st May, 2010
A simplified model of noise budget4
Three interesting frequencies:
GWADW 17th May – 21st May, 2010
An analogy: understanding
GWADW 17th May – 21st May, 2010
5
increase
Increase shutter speed:
increase Increase resolution:
>>
(I) Preparing pure quantum state
GWADW 17th May – 21st May, 2010
6
Increase
Pure state: occupying an area in the phase space
(II) Studying quantum dynamics
GWADW 17th May – 21st May, 2010
7
Modifying test-mass dynamics: Optical Spring
If , squeezing “breaths” for 5 cycles.
Quantitative results:
Quantum entanglement
GWADW 17th May – 21st May, 2010
8
(III) Light & test mass entanglement
GWADW 17th May – 21st May, 2010
9
“Classical” analogy:
Light & test mass:Light Test Mass Steerability
Choice InferOpen
(IV) Entanglement among test masses
GWADW 17th May – 21st May, 2010
10
Entangling TMs in two arms Entangling ITMs and ETMs
Scheme I Scheme II
Survival time (s) Comment: A long survival time allows us to study various decoherence effects, e.g, the thermal and also gravity decoherence.
(V) Teleporting quantum states
GWADW 17th May – 21st May, 2010
11
Hanford Livingston
Create a coupled pendulum and the quantum states swap.
Conclusions
>> GW detectors can be fancy tools for probing MQM.
>> We have outlined possible MQM experiments.
>> A sub-SQL classical noise window is essential.
12
GWADW 17th May – 21st May, 2010
The end
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13
Interested in the technical details?
Join the CLIO-MQM workshop at Tokyo!
Thank you!
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