Direct frequency-comb-driven raman spectroscopy of the 3D 2D3/2 - 3D2D5/2 transition in Ca+ ions: Isotope shifts and the search for new physics beyond the standard model

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I will present high-resolution isotope shift spectroscopy of five calcium isotopes using direct frequency-comb-driven Raman transitions between the terahertz-spaced 3d 2D3/2 and 3d 2D5/2 levels. Fig.1.c) shows absolute frequency measurements on a single 40Ca+ [1]. The achieved relative accuracy of 5.5 × 10-12 is nearly a factor of five better than the previous best Raman spectroscopy [2], and is currently limited by the inaccuracy of our atomic clock reference. By performing similar measurements on 42,44,46,48Ca+ ions, we determined the isotope shift of this transition with an accuracy of about 25 Hz. These measurements in combination with precise measurements of the 4s 2S1/2 - 3d 2D5/2 transition are today's best isotope shift measurements to our knowledge and allow for improved bounds on new physics beyond the standard model [3].

OriginalsprogEngelsk
Titel2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
ForlagIEEE
Udgivelsesår1 jun. 2019
Artikelnummer8872208
ISBN (Elektronisk)9781728104690
DOI
StatusUdgivet - 1 jun. 2019
Begivenhed2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 - Munich, Tyskland
Varighed: 23 jun. 201927 jun. 2019

Konference

Konference2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
LandTyskland
ByMunich
Periode23/06/201927/06/2019
SponsorEPS Young Minds, Quantum Electronics and Optics Division

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