Paving the way for fundamental physics tests with singly-ionized helium

J. J. Krauth*, L. S. Dreissen, C. Roth, E. L. Gründeman, M. Collombon, M. Favier, K. S.E. Eikema

*Corresponding author for this work

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Abstract

High-precision laser spectroscopy of atomic hydrogen has led to an impressive accuracy in tests of bound-state quantum electrodynamics (QED). At the current level of accuracy many systematics have to be studied very carefully and only independent measurements provide the ultimate cross-check. This has been proven recently by measurements in muonic hydrogen, eventually leading to a significant shift of the CODATA recommended values of the proton charge radius and the Rydberg constant. We aim to contribute to tests of fundamental physics by measuring the 1S-2S transition in the He+ ion for the first time. Combined with measurements in muonic helium ions this can probe the value of the Rydberg constant, test higher-order QED terms, or set benchmarks for ab initio nuclear polarizability calculations. We extend the Ramsey-comb spectroscopy method to the XUV using high-harmonic generation in order to excite a single, trapped He+ ion.

Original languageEnglish
Title of host publicationProceedings of Science PoS (FFK2019)049
PublisherarXiv.org
Pages1-10
Number of pages10
DOIs
Publication statusPublished - 29 Oct 2019
Event2019 International Conference on Precision Physics and Fundamental Physical Constants, FFK 2019 - Tihany, Hungary
Duration: 9 Jun 201914 Jun 2019

Conference

Conference2019 International Conference on Precision Physics and Fundamental Physical Constants, FFK 2019
CountryHungary
CityTihany
Period9/06/1914/06/19

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