| Zugriffsnummer | 45310 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Improved limits for violations of local position invariance from atomic clock comparisons |
| Autor(in); Institution |
Lange, Richard; 4.4, Zeit und Frequenz, PTB-Braunschweig
Huntemann, Nils; 4.4, Zeit und Frequenz, PTB-Braunschweig
Rahm, Johannes M.; 4.4, Zeit und Frequenz, PTB-Braunschweig
Sanner, Christian; 4.4, Zeit und Frequenz, PTB-Braunschweig
Shao, Hu; 4.4, Zeit und Frequenz, PTB-Braunschweig
Lipphardt, Burghard; 4.4, Zeit und Frequenz, PTB-Braunschweig
Tamm, Christian; 4.4, Zeit und Frequenz, PTB-Braunschweig
Weyers, Stefan; 4.4, Zeit und Frequenz, PTB-Braunschweig
Peik, Ekkehard; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | Physical Review Letters: 126 (2021), 1, 1 - 6 |
| Artikelnummer | 011102 |
| Availability | [online only] |
| ISSN | 0031-9007 (PRINT) ; 1079-7114 (ONLINE) |
| DOI | |
| Verlag | Ridge, NY: APS |
| Freie Schlagworte | Optical clocks ; Frequency measurements ; Tests of the equivalence principal ; Temporal variations of constants |
| Zusammenfassung | We compare two optical clocks based on the 2S1/2(F=0)→2D3/2(F=2) electric quadrupole (E2) and the 2S1/2(F=0)→2F7/2(F=3) electric octupole (E3) transition of 171Yb+ and measure the frequency ratio νE3/νE2=0.932829404530965376(32), improving upon previous measurements by an order of magnitude. Using two caesium fountain clocks, we find νE3=642121496772645.10(8) Hz, the most accurate determination of an optical transition frequency to date. Repeated measurements of both quantities over several years are analyzed for potential violations of local position invariance. We improve by factors of about 20 and 2 the limits for fractional temporal variations of the fine structure constant α to 1.0(1.1)×10-18/yr and of the proton-to-electron mass ratio μ to -8(36)×10-18/yr. Using the annual variation of the Sun’s gravitational potential at Earth Φ, we improve limits for a potential coupling of both constants to gravity, (c2/α)(dα/dΦ)=14(11)×10-9 and (c2/μ)(dμ/dΦ)=7(45)×10-8. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Zeit und Frequenz |
Zitierung
Lange, R., Huntemann, N., Rahm, J. M., Sanner, C., Shao, H., Lipphardt, B., Tamm, C., Weyers, S., & Peik, E. (2021). Improved limits for violations of local position invariance from atomic clock comparisons. Physical Review Letters, 126(1), 1–6. https://link.aps.org/doi/10.1103/physrevlett.126.011102