Mainz 2017 – wissenschaftliches Programm

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SYAP: Symposium Atomic and Plasma Physics at FAIR

SYAP 1: Atomic and Plasma Physics at FAIR

SYAP 1.2: Hauptvortrag

Dienstag, 7. März 2017, 11:30–12:00, P 1

Interrogating strongly bound electrons about fundamental physics — •José R. Crespo López-Urrutia — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Electronic wavefunctions in bound systems are in principle sensitive to all fundamental interactions, and precision spectroscopy thus provides information not only on quantum electrodynamics, nuclear size effects and parity violation studies, but also on other sectors of the standard model of physics. For electrons strongly bound in deep shells, the sensitivities to the different interactions are naturally enhanced by orders of magnitude. In highly charged ions (HCI), complicated electron-electron interactions are largely reduced, simplifying the theoretical analysis of experiments exploiting those sensitivities. Novel methods have been proposed, potentially capable of interrogating the time stability of fundamental constants using frequency metrology by means of optical clocks of ultimate precision. We pursue a double approach: finding electronic transitions with the appropriate characteristics [1], and cooling HCI to the required low temperatures [2]. Furthermore, we are preparing experiments aiming at extending frequency metrology to the extreme ultraviolet and soft x-ray region and accessing even more interesting electronic transitions in HCI. [1] A. Windberger et al., Phys. Rev. Lett. 114, 150801 (2015) [2] L. Schmöger et al., Science 347, 1233 (2015)