Theory Advances in High-Precision Two-Photon Spectroscopy

High-precision two-photon spectroscopy of hydrogen and hydrogenlike systems constitutes an exceptional tool for experimental tests of fundamental theories. In the analysis of these experiments, theory also plays a vital role in the modeling of time-resolved spectra, the calculation of precise transition matrix elements, and the correction of a number of systematic effects. This thesis gives a detailed analysis of the relevant two-photon excitation dynamics, starting from the single-atom response and leading to a Monte Carlo model which can be used for the analysis of atomic beam experiments. Dynamic polarizabilities of relevant S and D states, quantifying the dynamic Stark shift, and transition matrix elements among these states are calculated, taking into account leading-order relativistic, radiative and non-dipole laser-field effects. An important broadening effect of the experimentally observed spectra in the hydrogen 1S–2S spectroscopy experiment at the Max–Planck–Institut für Quantenoptik (MPQ) is identified and quantitatively described, as well as systematic frequency shifts. Corresponding possible improvements to the experimental setup are proposed. By combining the results of repeated MPQ hydrogen 1S–2S measurements and other experiments, in collaboration with the MPQ group, separate stringent limits on the possible drift of the magnetic moment of the cesium nucleus and the finestructure constant are deduced.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Universität Heidelberg

Year

2006

Author dc:creator

• Haas, Martin

Contributors dc:contributor

• Keitel, Christoph H.

Repository record source_url

http://www.ub.uni-heidelberg.de/archiv/6691

OAI identifier oai:identifier

oai:archiv.ub.uni-heidelberg.de:6691