SAMOP 2021 – wissenschaftliches Programm

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SYAD: Symposium SAMOP Dissertation Prize 2021

SYAD 1: SAMOP Dissertation Prize

SYAD 1.4: Hauptvortrag

Dienstag, 21. September 2021, 12:15–12:45, Audimax

Quantum Logic Spectroscopy of Highly Charged Ions — •Peter Micke — QUEST Institute for Experimental Quantum Metrology, Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany

Highly charged ions (HCI) are an extreme form of matter with excellent properties for novel high-accuracy atomic clocks. Such instruments have the potential to operate at a record precision of better than 10−18 for unprecedented time keeping and tests of physics beyond the Standard Model. However, HCI have not been accessible for clock-type spectroscopy before my dissertation work.

In my talk, I will describe how to overcome this challenge and present the first demonstration of coherent laser spectroscopy of an HCI. After isolating a single Ar13+ HCI from a hot plasma at a million kelvins and confining it together with a laser-cooled Be+ ion in the harmonic potential of a cryogenic radiofrequency ion trap, this two-ion crystal is cooled to its quantum-mechanical ground state of motion. Then, quantum logic and an ultrastable clock laser are used to resolve the forbidden optical fine-structure transition of Ar13+ with a fractional frequency uncertainty of 3×10−15. This constitutes an improvement of eight orders of magnitude over the previous standard technique and allows to measure other atomic properties with improved precision.

Since the experimental approach is universal, this work unlocks the entire atomic class of HCI for such precision measurements.

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