A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions

The Review of Scientific Instruments
T LeopoldP O Schmidt

Abstract

A cryogenic radio-frequency ion trap system designed for quantum logic spectroscopy of highly charged ions (HCI) is presented. It includes a segmented linear Paul trap, an in-vacuum imaging lens, and a helical resonator. We demonstrate ground state cooling of all three modes of motion of a single 9Be+ ion and determine their heating rates as well as excess axial micromotion. The trap shows one of the lowest levels of electric field noise published to date. We investigate the magnetic-field noise suppression in cryogenic shields made from segmented copper, the resulting magnetic field stability at the ion position and the resulting coherence time. Using this trap in conjunction with an electron beam ion trap and a deceleration beamline, we have been able to trap single highly charged Ar13+ (Ar XIV) ions concurrently with single Be+ ions, a key prerequisite for the first quantum logic spectroscopy of a HCI. This major stepping stone allows us to push highly-charged-ion spectroscopic precision from the gigahertz to the hertz level and below.

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Citations

Apr 29, 2020·Physical Chemistry Chemical Physics : PCCP·Jutta ToscanoBrianna R Heazlewood
Dec 13, 2019·Nature Communications·H BekkerJ C Berengut
Sep 12, 2020·Physical Review Letters·Chunhai LyuZoltán Harman
Jan 3, 2020·The Review of Scientific Instruments·Michal Hejduk, Brianna R Heazlewood
Dec 3, 2020·The Review of Scientific Instruments·T NordmannT E Mehlstäubler
Jul 11, 2021·The Review of Scientific Instruments·Qiming WuJiehang Zhang
Sep 3, 2021·The Review of Scientific Instruments·J StarkJ R Crespo López-Urrutia

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