Wigner function reconstruction in levitated optomechanics

Rashid, M., Toroš, M. and Ulbricht, H. (2017) Wigner function reconstruction in levitated optomechanics. Quantum Measurements and Quantum Metrology, 4, pp. 17-25. (doi: 10.1515/qmetro-2017-0003)

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Abstract

We demonstrate the reconstruction of the Wigner function from marginal distributions of the motion of a single trapped particle using homodyne detection. We show that it is possible to generate quantum states of levitated optomechanical systems even under the effect of continuous measurement by the trapping laser light. We describe the opto-mechanical coupling for the case of the particle trapped by a free-space focused laser beam, explicitly for the case without an optical cavity. We use the scheme to reconstruct the Wigner function of experimental data in perfect agreement with the expected Gaussian distribution of a thermal state of motion. This opens a route for quantum state preparation in levitated optomechanics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Toros, Dr Marko
Authors: Rashid, M., Toroš, M., and Ulbricht, H.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Quantum Measurements and Quantum Metrology
Publisher:De Gruyter
ISSN:2299-114X
ISSN (Online):2299-114X
Published Online:07 November 2017
Copyright Holders:Copyright © 2017 Muddassar Rashid et al.
First Published:First published in Quantum Measurements and Quantum Metrology 4: 17-25
Publisher Policy:Reproduced under a Creative Commons License

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