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Related Experiment Video

Updated: Aug 23, 2025

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

An optical atomic clock based on a highly charged ion.

Steven A King^1,2, Lukas J Spieß³, Peter Micke^1,4,5

¹Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.

|November 3, 2022

Summary

This summary is machine-generated.

Researchers developed a new optical atomic clock using highly charged ions (HCI), specifically Argon-13 plus (Ar13+). This breakthrough offers unprecedented accuracy for fundamental physics tests and searches for new physics beyond the standard model.

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Area of Science:

Atomic Physics
Metrology
Quantum Electrodynamics

Background:

Optical atomic clocks are leading measurement devices with broad applications.
Highly charged ions (HCI) offer unique atomic properties for enhanced clock performance and reduced environmental sensitivity.

Purpose of the Study:

To realize a new class of optical clocks utilizing highly charged ions.
To establish forbidden optical transitions in HCI as references for high-accuracy clocks and fundamental physics tests.

Main Methods:

Development of an optical atomic clock based on a magnetic-dipole transition in Ar13+.
Comprehensive evaluation of systematic frequency uncertainty.
Clock comparisons to improve transition frequency and isotope shift uncertainties.

Main Results:

Achieved a systematic frequency uncertainty of 2.2 × 10^-17 for the Ar13+ clock, comparable to existing optical clocks.
Improved uncertainties for absolute transition frequency and isotope shift by eight and nine orders of magnitude, respectively.
Investigated quantum electrodynamic (QED) nuclear recoil effects, reducing theoretical uncertainty by a factor of three.

Conclusions:

Forbidden optical transitions in HCI are established as viable references for cutting-edge optical clocks.
This work paves the way for future high-sensitivity searches for physics beyond the standard model.
The Ar13+ clock represents a significant advancement in precision measurement and fundamental physics exploration.