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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Institut für Physik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Kolloquium | Alle Termine | Institutskolloquium: PD Dr. Ekkehard Peik (Physikalisch-Technische Bundesanstalt)

Institutskolloquium: PD Dr. Ekkehard Peik (Physikalisch-Technische Bundesanstalt)

Vortrag zum Thema "Trapped ion optical clocks and tests of the equivalence principle"
Wann 15.01.2019 von 15:15 bis 17:00 (Europe/Berlin / UTC100) iCal
Wo Lise-Meitner-Haus, Christian-Gerthsen-Hörsaal, Newtonstraße 15, 12489 Berlin

Institutskolloquium: PD Dr. Ekkehard Peik (Physikalisch-Technische Bundesanstalt, Braunschweig) spricht zum Thema "Trapped ion optical clocks and tests of the equivalence principle".

Abstract

Optical clocks based on different atoms and ions with systematic uncertainties in the low 10-18 range allow for frequency comparisons and precise measurements of frequency ratios [1]. These can be used in tests of fundamental physics, especially quantitative tests of relativity and searches for violations of the equivalence principle [2]. The 171Yb+ optical clock that is based on the extremely narrow S-F electric octupole transition possesses a favorable combination of small systematic uncertainty and high sensitivity for such tests because of the strongly relativistic character of the excited state [3]. In comparisons of two 171Yb+ single-ion clocks and primary Cs clocks at PTB we perform tests for temporal variations of the fine structure constant, the proton-to-electron mass ratio and for violations of local Lorentz invariance [4].

1. A. D. Ludlow, M. M. Boyd, Jun Ye, E. Peik, P. O. Schmidt, Rev. Mod. Phys. 87, 637 (2015)

2. M. S. Safronova, D. Budker, D. DeMille, Derek F. Jackson Kimball, A. Derevianko and C. W. Clark, Rev. Mod. Phys. 90, 025008 (2018)

3. N. Huntemann, C. Sanner, B. Lipphardt, Chr. Tamm, and E. Peik, Phys. Rev. Lett. 116, 063001 (2016)

4. C. Sanner, N. Huntemann, R. Lange, Chr. Tamm, E. Peik, M. Safronova, S. Porsev, arXiv 1809.10742