Robustness of system-filter separation for the feedback control of a quantum harmonic oscillator undergoing continuous position measurement

Szigeti, S. S., Adlong, S. J., Hush, M. R., Carvalho, A. R. R. and Hope, J. J. (2013) Robustness of system-filter separation for the feedback control of a quantum harmonic oscillator undergoing continuous position measurement. Physical Review A, 87 1: . doi:10.1103/PhysRevA.87.013626

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Author Szigeti, S. S.
Adlong, S. J.
Hush, M. R.
Carvalho, A. R. R.
Hope, J. J.
Title Robustness of system-filter separation for the feedback control of a quantum harmonic oscillator undergoing continuous position measurement
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2013-01-23
Year available 2013
Sub-type Article (original research)
DOI 10.1103/PhysRevA.87.013626
Open Access Status File (Publisher version)
Volume 87
Issue 1
Total pages 11
Place of publication College Park, MD United States
Publisher American Physical Society
Language eng
Subject 3107 Atomic and Molecular Physics, and Optics
Abstract We consider the effects of experimental imperfections on the problem of estimation-based feedback control of a trapped particle undergoing continuous position measurement. These limitations violate the assumption that the estimator (i.e., filter) accurately models the underlying system, thus requiring a separate analysis of the system and filter dynamics. We quantify the parameter regimes for stable cooling and show that the control scheme is robust to detector inefficiency, time delay, technical noise, and miscalibrated parameters. We apply these results to the specific context of a weakly-interacting Bose-Einstein condensate (BEC). Given that this system has previously been shown to be less stable than a feedback-cooled BEC with strong interatomic interactions, this result shows that reasonable experimental imperfections do not limit the feasibility of cooling a BEC by continuous measurement and feedback.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 18 May 2014, 09:09:48 EST by Stuart Szigeti on behalf of School of Mathematics & Physics