Feedback control of trapped coherent atomic ensembles
arXiv:1207.3203 · doi:10.1103/PhysRevLett.110.210503
Abstract
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 back-action and 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.
9 pages, 6 figures
References in corpus (12)
- Atom Interferometers
- Magnetic sensitivity beyond the projection noise limit by spin squeezing
- Progress in Atomic Fountains at LNE-SYRTE
- Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting
- Robust quantum parameter estimation: coherent magnetometry with feedback
- Efficient Quantum State Estimation by Continuous Weak Measurement and Dynamical Control
- Spin squeezing of atomic ensembles by multi-colour quantum non-demolition measurements
- Heterodyne non-demolition measurements on cold atomic samples: towards the preparation of non-classical states for atom interferometry
- Locking Local Oscillator Phase to the Atomic Phase via Weak Measurement
- Spin-squeezing and Dicke state preparation by heterodyne measurement
- In situ characterization of an optical cavity using atomic light shift
- Minimally-destructive detection of magnetically-trapped atoms using frequency-synthesised light
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