Detuned mechanical parametric amplification as a quantum non-demolition measurement

Szorkovszky, A., Clerk, A. A., Doherty, A. C. and Bowen, W. P. (2014) Detuned mechanical parametric amplification as a quantum non-demolition measurement. New Journal of Physics, 16 . doi:10.1088/1367-2630/16/4/043023


Author Szorkovszky, A.
Clerk, A. A.
Doherty, A. C.
Bowen, W. P.
Title Detuned mechanical parametric amplification as a quantum non-demolition measurement
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2014-04-01
Year available 2014
Sub-type Article (original research)
DOI 10.1088/1367-2630/16/4/043023
Open Access Status DOI
Volume 16
Total pages 16
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2015
Language eng
Abstract Recently it has been demonstrated that the combination of continuous position detection with detuned parametric driving can lead to significant steady-state mechanical squeezing, far beyond the 3 dB limit normally associated with parametric driving. In this work, we show the close connection between this detuned scheme and quantum non-demolition (QND) measurement of a single mechanical quadrature. In particular, we show that applying an experimentally realistic detuned parametric drive to a cavity optomechanical system allows one to effectively realize a QND measurement despite being in the bad-cavity limit. In the limit of strong squeezing, we show that this scheme offers significant advantages over standard backaction evasion, not only by allowing operation in the weak measurement and low efficiency regimes, but also in terms of the purity of the mechanical state.
Keyword Quantum measurement
Optomechanics
MEMS
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number 043023

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
 
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Created: Sun, 25 May 2014, 10:13:33 EST by System User on behalf of Engineered Quantum Systems