Ultracold strontium clock: applications to the measurement of fundamental constant variations
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We describe the application of high accuracy Srspectroscopy to the measurement of the variation of thefundamental constants of nature. We first describe recent progressof the JILA Sr optical frequency standard, with a systematicuncertainty evaluation at the 10-16 fractional frequencylevel. Using recent internationally based measurements of the Srclock frequency, we show improved constraints of gravitational andtemporal changes in the fine structure constant and theelectron-proton mass ratio. Finally, we describe how ultracoldatomic strontium, confined in an optical lattice, can beassociated into molecular dimers and be used for amodel-independent measurement of the variation of theelectron-proton mass ratio.
Original language | English |
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Journal | European Physical Journal. Special topics |
Volume | 163 |
Issue number | 1 |
Pages (from-to) | 9-18 |
Number of pages | 9 |
ISSN | 1951-6355 |
DOIs | |
Publication status | Published - 2008 |
ID: 17270358