Real-time synchronization feedbacks for single-atom frequency standards

Details Real-time synchronization feedbacks for single-atom frequency standards Real-time synchronization feedbacks for single-atom frequency standards

2008-06-09

arxiv.org/abs/0806.1392v2

Physics

Mathematical Physics

20 pages, 4 figures

Scientific paper

Simple feedback loops, inspired from extremum-seeking, are proposed to lock a probe-frequency to the transition frequency of a single quantum system following quantum Monte-Carlo trajectories. Two specific quantum systems are addressed, a 2-level one and a 3-level one that appears in coherence population trapping and optical pumping. For both systems, the feedback algorithm is shown to be convergent in the following sense: the probe frequency converges in average towards the system-transition one and its standard deviation can be made arbitrarily small. Closed-loop simulations illustrate robustness versus jump-detection efficiency and modeling errors.

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