Recent atomic clock comparisons at NIST
| العنوان: | Recent atomic clock comparisons at NIST |
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| المؤلفون: | LORINI, LUCA, N. ASHBY, A. BRUSCH, S. DIDDAMS, R. DRULLINGER, E. EASON, T. FORTIER, P. HASTINGS, T. HEAVNER, D. HUME, W. ITANO, S. JEFFERTS, N. NEWBURY, T. PARKER, T. ROSENBAND, J. STALNAKER, W. SWANN, D. WINELAND, J. BERGQUIST |
| المساهمون: | Lorini, Luca, N., Ashby, A., Brusch, S., Diddam, R., Drullinger, E., Eason, T., Fortier, P., Hasting, T., Heavner, D., Hume, W., Itano, S., Jeffert, N., Newbury, T., Parker, T., Rosenband, J., Stalnaker, W., Swann, D., Wineland, J., Bergquist |
| سنة النشر: | 2008 |
| المجموعة: | INRiM: CINECA IRIS (Istituto Nazionale di Ricerca Metrologica) |
| الوصف: | The record of atomic clock frequency comparisons at NIST over the past half-decade provides one of the tightest constraints of any present-day temporal variations of the fundamental constants. Notably, the 6-year record of increasingly precise measurements of the absolute frequency of the Hg(+) single-ion optical clock (using the cesium primary frequency standard NIST-F1) constrains the temporal variation of the. ne structure constant a to less than 2 . 10(-16) yr(-1) and offers a Local Position Invariance test in the framework of General Relativity. The most recent measurement of the frequency ratio of the Al(+) and Hg+ optical clocks is reported with a fractional frequency uncertainty of +/- 5.2 . 10(-17). The record of such measurements over the last year sensitively tests for a temporal variation of a and constrains. (alpha) over dot/alpha = (-1.6 +/- 2.3) . 10(-17) yr(-1), consistent with zero. |
| نوع الوثيقة: | other/unknown material |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000260889500003; volume:163; firstpage:19; lastpage:35; numberofpages:17; journal:THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS; http://hdl.handle.net/11696/33565; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-56549108771; http://www.springerlink.com/content/n60r56l604577k77/ |
| DOI: | 10.1140/epjst/e2008-00807-7 |
| الاتاحة: | http://hdl.handle.net/11696/33565 https://doi.org/10.1140/epjst/e2008-00807-7 http://www.springerlink.com/content/n60r56l604577k77/ |
| رقم الانضمام: | edsbas.578C06A7 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1140/epjst/e2008-00807-7 |
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