2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/218132Comparison of precision frequency measurements to quantum electrodynamics (QED) predictions for Rydberg states of hydrogen-like ions can yield information on values of fundamental constants and test theory. With the results of a calculation of a key QED contribution reported here, the uncertainty in the theory of the energy levels is reduced to a level where such a comparison can yield an improved value of the Rydberg constant.4 pages, RevTeXAtomic PhysicsFundamental constants and tests of theory in Rydberg states of hydrogen-like ionstext