Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 1808-1812 |
| Seitenumfang | 5 |
| Fachzeitschrift | Science |
| Jahrgang | 319 |
| Ausgabenummer | 5871 |
| Publikationsstatus | Veröffentlicht - 28 März 2008 |
| Extern publiziert | Ja |
Abstract
Time has always had a special status in physics because of its fundamental role in specifying the regularities of nature and because of the extraordinary precision with which it can be measured. This precision enables tests of fundamental physics and cosmology, as well as practical applications such as satellite navigation. Recently, a regime of operation for atomic clocks based on optical transitions has become possible, promising even higher performance. We report the frequency ratio of two optical atomic clocks with a fractional uncertainty of 5.2 × 10-17. The ratio of aluminum and mercury single-ion optical clock frequencies νAl+/ν Hg+ is 1.052871833148990438(55), where the uncertainty comprises a statistical measurement uncertainty of 4.3 × 10-17, and systematic uncertainties of 1.9 × 10-17 and 2.3 × 10-17 in the mercury and aluminum frequency standards, respectively. Repeated measurements during the past year yield a preliminary constraint on the temporal variation of the fine-structure constant a of α̇=α (-1:6 ± 2:3) × 10-17/year.
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in: Science, Jahrgang 319, Nr. 5871, 28.03.2008, S. 1808-1812.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place
AU - Rosenband, T.
AU - Hume, D. B.
AU - Schmidt, Piet Oliver
AU - Chou, C. W.
AU - Brusch, A.
AU - Lorini, L.
AU - Oskay, W. H.
AU - Drullinger, R. E.
AU - Fortier, T. M.
AU - Stalnaker, J. E.
AU - Diddams, S. A.
AU - Swann, W. C.
AU - Newbury, N. R.
AU - Itano, W. M.
AU - Wineland, D. J.
AU - Bergquist, J. C.
PY - 2008/3/28
Y1 - 2008/3/28
N2 - Time has always had a special status in physics because of its fundamental role in specifying the regularities of nature and because of the extraordinary precision with which it can be measured. This precision enables tests of fundamental physics and cosmology, as well as practical applications such as satellite navigation. Recently, a regime of operation for atomic clocks based on optical transitions has become possible, promising even higher performance. We report the frequency ratio of two optical atomic clocks with a fractional uncertainty of 5.2 × 10-17. The ratio of aluminum and mercury single-ion optical clock frequencies νAl+/ν Hg+ is 1.052871833148990438(55), where the uncertainty comprises a statistical measurement uncertainty of 4.3 × 10-17, and systematic uncertainties of 1.9 × 10-17 and 2.3 × 10-17 in the mercury and aluminum frequency standards, respectively. Repeated measurements during the past year yield a preliminary constraint on the temporal variation of the fine-structure constant a of α̇=α (-1:6 ± 2:3) × 10-17/year.
AB - Time has always had a special status in physics because of its fundamental role in specifying the regularities of nature and because of the extraordinary precision with which it can be measured. This precision enables tests of fundamental physics and cosmology, as well as practical applications such as satellite navigation. Recently, a regime of operation for atomic clocks based on optical transitions has become possible, promising even higher performance. We report the frequency ratio of two optical atomic clocks with a fractional uncertainty of 5.2 × 10-17. The ratio of aluminum and mercury single-ion optical clock frequencies νAl+/ν Hg+ is 1.052871833148990438(55), where the uncertainty comprises a statistical measurement uncertainty of 4.3 × 10-17, and systematic uncertainties of 1.9 × 10-17 and 2.3 × 10-17 in the mercury and aluminum frequency standards, respectively. Repeated measurements during the past year yield a preliminary constraint on the temporal variation of the fine-structure constant a of α̇=α (-1:6 ± 2:3) × 10-17/year.
UR - http://www.scopus.com/inward/record.url?scp=41349092289&partnerID=8YFLogxK
U2 - 10.1126/science.1154622
DO - 10.1126/science.1154622
M3 - Article
AN - SCOPUS:41349092289
VL - 319
SP - 1808
EP - 1812
JO - Science
JF - Science
SN - 0036-8075
IS - 5871
ER -