Feedback Control of Trapped Coherent Atomic Ensembles
LANDRAGIN, Arnaud
Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace [LNE - SYRTE]
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Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace [LNE - SYRTE]
Langue
en
Article de revue
Ce document a été publié dans
Physical Review Letters. 2013-05-23, vol. 110, n° 21, p. 210503
American Physical Society
Résumé en anglais
We demonstrate how to use feedback to control the internal states of trapped coherent ensembles of two-level atoms, and to protect a superposition state against the decoherence induced by a collective noise. Our feedback ...Lire la suite >
We demonstrate how to use feedback to control the internal states of trapped coherent ensembles of two-level atoms, and to protect a superposition state against the decoherence induced by a collective noise. Our feedback scheme is based on weak optical measurements with negligible backaction followed by coherent microwave manipulations. The efficiency of the feedback system is studied for a simple binary noise model and characterized in terms of the trade-off between information retrieval and destructivity from the optical probe. We also demonstrate the correction of more general types of collective noise. This technique can be used for the operation of atomic interferometers beyond the standard Ramsey scheme, opening the way towards improved atomic sensors.< Réduire
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