measuring very small things - göteborgs...
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![Page 1: Measuring very small things - Göteborgs universitetphysics.gu.se/~tfkhj/christin_fka091.pdfCastelldefels, 3 ICREA—1ns Bar E-mail: oriol. New Journal o Toward quantum superposition](https://reader034.vdocuments.site/reader034/viewer/2022050414/5f8b2d568568f7237a748e90/html5/thumbnails/1.jpg)
Measuring very small things
Christin Rhén
December 10th 2015
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![Page 3: Measuring very small things - Göteborgs universitetphysics.gu.se/~tfkhj/christin_fka091.pdfCastelldefels, 3 ICREA—1ns Bar E-mail: oriol. New Journal o Toward quantum superposition](https://reader034.vdocuments.site/reader034/viewer/2022050414/5f8b2d568568f7237a748e90/html5/thumbnails/3.jpg)
What is a measurement?
Perturbation of the
measurement system
Ideally: controlled,
predictable, verifiable
Reality: depends of the
details of the system
(sensitivity, noise)
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Driven harmonic oscillator
![Page 5: Measuring very small things - Göteborgs universitetphysics.gu.se/~tfkhj/christin_fka091.pdfCastelldefels, 3 ICREA—1ns Bar E-mail: oriol. New Journal o Toward quantum superposition](https://reader034.vdocuments.site/reader034/viewer/2022050414/5f8b2d568568f7237a748e90/html5/thumbnails/5.jpg)
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Initial ringdown
Thermalized state
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If only there was an analogous system that was
naturally isolated from the environment and
could be controlled with a very high precision…
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If only there was an analogous system that was
naturally isolated from the environment and
could be controlled with a very high precision…
![Page 14: Measuring very small things - Göteborgs universitetphysics.gu.se/~tfkhj/christin_fka091.pdfCastelldefels, 3 ICREA—1ns Bar E-mail: oriol. New Journal o Toward quantum superposition](https://reader034.vdocuments.site/reader034/viewer/2022050414/5f8b2d568568f7237a748e90/html5/thumbnails/14.jpg)
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Equivalent to nanomechanical system?
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Acknowledgments
Andreas Isacsson Jari Kinaret