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Theses

Electromechanical cooling and parametric amplification of an ultrahigh-Q mechanical oscillator

Abstract : In this thesis, we have studied an ultrahigh quality factor mechanical oscillator coupled to a microwave cavity. We will present an original technique to probe the losses of planar microwave cavities, as well as a resolved sideband cooling technique to actively cool this mechanical oscillator using the microwave cavity. Finally, we will present some optimizations of this experiment which open the path towards the ground state cooling of the mechanical oscillator. Such a hybrid quantum system could be used as an on-chip quantum memory, able to store fragile quantum states generated by superconducting quantum circuits for coherence times approaching a second.
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https://hal.archives-ouvertes.fr/tel-03030362
Contributor : Thibault Capelle Connect in order to contact the contributor
Submitted on : Tuesday, December 1, 2020 - 6:27:41 PM
Last modification on : Friday, October 15, 2021 - 1:41:24 PM
Long-term archiving on: : Tuesday, March 2, 2021 - 6:13:25 PM

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  • HAL Id : tel-03030362, version 1

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Thibault Capelle. Electromechanical cooling and parametric amplification of an ultrahigh-Q mechanical oscillator. Quantum Physics [quant-ph]. Sorbonne Université / Université Pierre et Marie Curie - Paris VI, 2020. English. ⟨tel-03030362v1⟩

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