Hydrogen molecular ions: new schemes for metrology and fundamental physics tests

8th Symposium on Frequency Standards and Metrology 2015

Karr, Jean-Philippe^1,2 ; Patra, Sayan^3 ; Koelemeij, Jeroen C. J.^3 ; Heinrich, Johannes^1 ; Sillitoe, Nicolas^1 ; Douillet, Albane^1,2 ; Hilico, Laurent^1,2

Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4 place Jussieu, Paris

F-75005, France^1

Université d'Evry-Val d'Essonne, Boulevard François Mitterrand, Evry

F-91000, France^2

LaserLaB, Department of Physics and Astronomy, VU University, De Boelelaan 1081, Amsterdam

1081 HV, Netherlands^3

关键词: Electron mass;    Fundamental constants;    Fundamental physics;    Fundamental theory;    High-accuracy;    Hydrogen molecular ion;    Rovibrational transitions;    Two-photon spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012048/pdf
DOI  :  10.1088/1742-6596/723/1/012048

来源: IOP

【 摘 要 】

High-accuracy spectroscopy of hydrogen molecular ions has important applications for the metrology of fundamental constants and tests of fundamental theories. Up to now, the experimental resolution has not surpassed the part-per-billion range. We discuss two methods by which it could be improved by a huge factor. Firstly, the feasibility of Doppler-free quasidegenerate two-photon spectroscopy of trapped and sympathetically cooled ensembles of HD+ions is discussed, and it is shown that rovibrational transitions may be detected with a good signal-to-noise ratio. Secondly, the performance of a molecular quantum-logic ion clock based on a single Be+-H2+ion pair is analyzed in detail. Such a clock could allow testing the constancy of the proton-to-electron mass ratio at the 10-17/yr level.