Nonlinear optomechanical measurement of mechanical motion

Brawley, G. A., Vanner, M. R., Larsen, P. E., Schmid, S., Boisen, A. and Bowen, W. P. (2016) Nonlinear optomechanical measurement of mechanical motion. Nature Communications, 7 10988: 1-7. doi:10.1038/ncomms10988

Author Brawley, G. A.
Vanner, M. R.
Larsen, P. E.
Schmid, S.
Boisen, A.
Bowen, W. P.
Title Nonlinear optomechanical measurement of mechanical motion
Journal name Nature Communications   Check publisher's open access policy
ISSN 2041-1723
Publication date 2016-03-21
Year available 2016
Sub-type Article (original research)
DOI 10.1038/ncomms10988
Open Access Status DOI
Volume 7
Issue 10988
Start page 1
End page 7
Total pages 7
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2017
Language eng
Abstract Precision measurement of nonlinear observables is an important goal in all facets of quantum optics. This allows measurement-based non-classical state preparation, which has been applied to great success in various physical systems, and provides a route for quantum information processing with otherwise linear interactions. In cavity optomechanics much progress has been made using linear interactions and measurement, but observation of nonlinear mechanical degrees-of-freedom remains outstanding. Here we report the observation of displacement-squared thermal motion of a micro-mechanical resonator by exploiting the intrinsic nonlinearity of the radiation-pressure interaction. Using this measurement we generate bimodal mechanical states of motion with separations and feature sizes well below 100 pm. Future improvements to this approach will allow the preparation of quantum superposition states, which can be used to experimentally explore collapse models of the wavefunction and the potential for mechanical-resonator-based quantum information and metrology applications.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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