Perspectives on testing fundamental physics with highly charged ions in Penning traps

TL;DR

This paper reviews how highly charged ions in Penning traps enable high-precision tests of fundamental physics, including measurements of atomic masses and magnetic moments, contributing to fundamental constant determination and QED tests.

Contribution

It summarizes recent advances and future prospects in high-precision Penning-trap spectroscopy with highly charged ions for fundamental physics tests.

Findings

High-precision measurements of atomic and nuclear masses.

Determination of fundamental constants like the electron mass.

Stringent tests of bound-state quantum electrodynamics.

Abstract

In Penning traps electromagnetic forces are used to confine charged particles under well-controlled conditions for virtually unlimited time. Sensitive detection methods have been developed to allow observation of single stored ions. Various cooling methods can be employed to reduce the energy of the trapped particle to nearly at rest. In this review we summarize how highly charged ions offer unique possibilities for precision measurements in Penning traps. Precision atomic and nuclear masses as well as magnetic moments of bound electrons allow among others to determine fundamental constants like the mass of the electron or to perform stringent tests of fundamental interactions like bound-state quantum electrodynamics. Recent results and future perspectives in high-precision Penning-trap spectroscopy with highly charged ions will be discussed.