Abstract
Recent progress in laser cooling and trapping of neutral atoms is paving the way for the development of more accurate caesium atomic clocks. This paper surveys the progress of ground-based fountain clocks, reporting in detail on some recent results obtained with the prototype clock under development at LPTF, and also discusses the prospects for satellite-based clocks, which, taking advantage of a reduced-gravity environment, may enable the full potential of laser cooling to be realized.
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