TBA

by Ekkehard Peik

at Physics Colloquium

Tue, 20 Nov 2018, 15:30
Nanotechnology institute building (#51) room 15

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 a 87Sr optical lattice clock 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 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 Refreshments are served at 15:15

Created on 07-11-2018 by Bar Lev, Yevgeny (ybarlev)
Updaded on 07-11-2018 by Bar Lev, Yevgeny (ybarlev)