Resolved-sideband cooling of a single $^9$Be$^+$ ion in a Penning trap

authored by: Juan M. Cornejo, Johannes Brombacher, Julia A. Coenders, Moritz von Boehn, Teresa Meiners, Malte Niemann, Stefan Ulmer, Christian Ospelkaus
Abstract: Manipulating individual trapped ions at the single quantum level has become standard practice in radio-frequency ion traps, enabling applications from quantum information processing to precision metrology. The key ingredient is ground-state cooling of the particle's motion through resolved-sideband laser cooling. Ultra-high-presicion experiments using Penning ion traps will greatly benefit from the reduction of systematic errors offered by full motional control, with applications to atomic masses and $g$-factor measurements, determinations of fundamental constants or related tests of fundamental physics. In addition, it will allow to implement quantum logic spectroscopy, a technique that has enabled a new class of precision measurements in radio-frequency ion traps. Here we demonstrate resolved-sideband laser cooling of the axial motion of a single $^9$Be$^+$ ion in a cryogenic 5 Tesla Penning trap system using a two-photon stimulated-Raman process, reaching a mean phonon number of $\bar{n}_z = 0.10(4)$. This is a fundamental step in the implementation of quantum logic spectroscopy for matter-antimatter comparison tests in the baryonic sector of the Standard Model and a key step towards improved precision experiments in Penning traps operating at the quantum limit.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
Laboratory of Nano and Quantum Engineering
Trapped-Ion Quantum Engineering
Type: Preprint
Publication date: 27.10.2023
Publication status: Published

BibTeX

@techreport{e71cff79fe5d4108a6cd011f4505d7a9,
title = "Resolved-sideband cooling of a single $^9$Be$^+$ ion in a Penning trap",
abstract = " Manipulating individual trapped ions at the single quantum level has become standard practice in radio-frequency ion traps, enabling applications from quantum information processing to precision metrology. The key ingredient is ground-state cooling of the particle's motion through resolved-sideband laser cooling. Ultra-high-presicion experiments using Penning ion traps will greatly benefit from the reduction of systematic errors offered by full motional control, with applications to atomic masses and $g$-factor measurements, determinations of fundamental constants or related tests of fundamental physics. In addition, it will allow to implement quantum logic spectroscopy, a technique that has enabled a new class of precision measurements in radio-frequency ion traps. Here we demonstrate resolved-sideband laser cooling of the axial motion of a single $^9$Be$^+$ ion in a cryogenic 5 Tesla Penning trap system using a two-photon stimulated-Raman process, reaching a mean phonon number of $\bar{n}_z = 0.10(4)$. This is a fundamental step in the implementation of quantum logic spectroscopy for matter-antimatter comparison tests in the baryonic sector of the Standard Model and a key step towards improved precision experiments in Penning traps operating at the quantum limit. ",
keywords = "physics.atom-ph, quant-ph",
author = "Cornejo, {Juan M.} and Johannes Brombacher and Coenders, {Julia A.} and Boehn, {Moritz von} and Teresa Meiners and Malte Niemann and Stefan Ulmer and Christian Ospelkaus",
note = "6 pages, 5 figures",
year = "2023",
month = oct,
day = "27",
language = "English",
type = "WorkingPaper",
}