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Quantum nondemolition measurement of mechanical motion quanta
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Copenhagen, Denmark.
Number of Authors: 42018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 3621Article in journal (Refereed) Published
Abstract [en]

The fields of optomechanics and electromechanics have facilitated numerous advances in the areas of precision measurement and sensing, ultimately driving the studies of mechanical systems into the quantum regime. To date, however, the quantization of the mechanical motion and the associated quantum jumps between phonon states remains elusive. For optomechanical systems, the coupling to the environment was shown to make the detection of the mechanical mode occupation difficult, typically requiring the single-photon strong coupling regime. Here, we propose and analyse an electromechanical setup, which allows us to overcome this limitation and resolve the energy levels of a mechanical oscillator. We found that the heating of the membrane, caused by the interaction with the environment and unwanted couplings, can be suppressed for carefully designed electromechanical systems. The results suggest that phonon number measurement is within reach for modern electromechanical setups.

Place, publisher, year, edition, pages
2018. Vol. 9, article id 3621
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Other Natural Sciences
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URN: urn:nbn:se:su:diva-160203DOI: 10.1038/s41467-018-06070-yISI: 000443797400022PubMedID: 30190532OAI: oai:DiVA.org:su-160203DiVA, id: diva2:1251105
Available from: 2018-09-26 Created: 2018-09-26 Last updated: 2018-09-26Bibliographically approved

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Dellantonio, LucaKyriienko, OleksandrSørensen, Anders S.
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