testing macroscopic quantum mechanics (mqm) with future gw detectors
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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 PresentationTRANSCRIPT
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:-)
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Caltech
UCSB LIGOMITViennaYale
From ng up to kg
Optomechanics:
LKB AEI CLIOUWA
>> Quantum-limited measurement of weak forces and beyond
Motivations
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>> Quantum-to-classical transition
>> Quantum information with mechanical devices
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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.
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A simplified model of noise budget4
Three interesting frequencies:
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An analogy: understanding
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increase
Increase shutter speed:
increase Increase resolution:
>>
(I) Preparing pure quantum state
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Increase
Pure state: occupying an area in the phase space
(II) Studying quantum dynamics
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Modifying test-mass dynamics: Optical Spring
If , squeezing “breaths” for 5 cycles.
Quantitative results:
Quantum entanglement
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(III) Light & test mass entanglement
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“Classical” analogy:
Light & test mass:Light Test Mass Steerability
Choice InferOpen
(IV) Entanglement among test masses
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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
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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.
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The end
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Interested in the technical details?
Join the CLIO-MQM workshop at Tokyo!
Thank you!