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Effects of measurement back-action in the stabilization of a Bose-Einstein condensate through feedback

Wilson, Stuart; Carvalho, Andre; Hope, Joseph; James, Matthew


We apply quantum filtering and control to a particle in a harmonic trap under continuous position measurement, and show that a simple static feedback law can be used to cool the system. The final steady state is Gaussian and dependent on the feedback strength and coupling between the system and probe. In the limit of weak coupling, this final state becomes the ground state. An earlier model by Haine [Phys. Rev. A 69, 13605 (2004)] without measurement backaction showed dark states: states that...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.76.013610


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