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Quantum nondemolition measurement of mechanical motion quanta
Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.;Univ Copenhagen, Niels Bohr Inst, Ctr Hybrid Quantum Networks Hy Q, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark..ORCID iD: 0000-0003-1914-6539
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark..
Univ Erlangen Nurnberg, Inst Theoret Phys, Staudstr 7, D-91058 Erlangen, Germany.;Max Planck Inst Sci Light, Gunther Scharowsky Str 1, D-91058 Erlangen, Germany..
Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.;Univ Copenhagen, Niels Bohr Inst, Ctr Hybrid Quantum Networks Hy Q, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark..
2018 (English)In: Nature Communications, 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
Nature Publishing Group, 2018. Vol. 9, article id 3621
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-235105DOI: 10.1038/s41467-018-06070-yISI: 000443797400022PubMedID: 30190532Scopus ID: 2-s2.0-85052961125OAI: oai:DiVA.org:kth-235105DiVA, id: diva2:1249360
Funder
EU, FP7, Seventh Framework Programme
Note

QC 20180919

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2024-03-15Bibliographically approved

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Kyriienko, Oleksandr

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