Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging

Szigeti, S. S., Hush, M. R., Carvalho, A. R. R. and Hope, J. J. (2010) Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging. Physical Review A, 82 4: . doi:10.1103/PhysRevA.82.043632

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Author Szigeti, S. S.
Hush, M. R.
Carvalho, A. R. R.
Hope, J. J.
Title Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2010-10-29
Year available 2010
Sub-type Article (original research)
DOI 10.1103/PhysRevA.82.043632
Open Access Status File (Publisher version)
Volume 82
Issue 4
Total pages 10
Place of publication College Park, MD United States
Publisher American Physical Society
Collection year 2011
Language eng
Subject 3107 Atomic and Molecular Physics, and Optics
Abstract The linewidth of an atom laser is limited by density fluctuations in the Bose-Einstein condensate (BEC) from which the atom laser beam is outcoupled. In this paper we show that a stable spatial mode for an interacting BEC can be generated using a realistic control scheme that includes the effects of the measurement backaction. This model extends the feedback theory, based on a phase-contrast imaging setup, presented by Szigeti, Hush, Carvalho, and Hope [Phys. Rev. APLRAAN1050-294710.1103/PhysRevA.80.013614 80, 013614 (2009)]. In particular, it is applicable to a BEC with large interatomic interactions and solves the problem of inadequacy of the mean-field (coherent state) approximation by utilizing a fixed number state approximation. Our numerical analysis shows the control to be more effective for a condensate with a large nonlinearity.
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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Created: Sun, 18 May 2014, 09:07:34 EST by Stuart Szigeti on behalf of School of Mathematics & Physics