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| Ahmed,Mushtaq; Magalhães,Daniel V.; Bebeachibuli,Aida; Müller,Stella T.; Alves,Renato F.; Ortega,Tiago A.; Weiner,John; Bagnato,Vanderlei S.. |
| Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past four decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. The adoption of optical cooling and trapping techniques, has produced a major advance in atomic clock precision. Cold-atom fountain and compact cold-atom clocks have also been developed. Measurement precision of a few parts in 10(15) has been demonstrated for a cold-atom fountain clock. We present here an overview of the time and frequency metrology program based on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atomic clock; Cold atoms; Time and frequency; Metrology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200002 |
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