Continuous measurement feedback control of a Bose-Einstein condensate using phase-contrast imaging

Szigeti, S. S., Hush, M. R., Carvalho, A. R. R. and Hope, J. J. (2009) Continuous measurement feedback control of a Bose-Einstein condensate using phase-contrast imaging. Physical Review A, 80 1: . doi:10.1103/PhysRevA.80.013614

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Author Szigeti, S. S.
Hush, M. R.
Carvalho, A. R. R.
Hope, J. J.
Title Continuous measurement feedback control of a 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 2009-08-06
Year available 2009
Sub-type Article (original research)
DOI 10.1103/PhysRevA.80.013614
Open Access Status File (Publisher version)
Volume 80
Issue 1
Total pages 11
Place of publication College Park, MD United States
Publisher American Physical Society
Collection year 2010
Language eng
Subject 3107 Atomic and Molecular Physics, and Optics
Abstract We consider the theory of feedback control of a Bose-Einstein condensate (BEC) confined in a harmonic trap under a continuous measurement constructed via nondestructive imaging. A filtering theory approach is used to derive a stochastic master equation (SME) for the system from a general Hamiltonian based upon system-bath coupling. Numerical solutions for this SME in the limit of a single atom show that the final steady-state energy is dependent upon the measurement strength, the ratio of photon kinetic energy to atomic kinetic energy, and the feedback strength. Simulations indicate that for a weak measurement strength, feedback can be used to overcome heating introduced by the scattering of light, thereby allowing the atom to be driven toward the ground state.
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, 09:01:36 EST by Stuart Szigeti on behalf of School of Mathematics & Physics