Sympathetic cooling of a trapped proton mediated by an LC circuit

authored by: BASE Collaboration , M. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, S. Gavranovic, J. Harrington, B. Latacz, A. Mooser, D. Popper, E. Wursten, K. Blaum, Y. Matsuda, Christian Ospelkaus, W. Quint, J. Walz, S. Ulmer
Abstract: Efficient cooling of trapped charged particles is essential to many fundamental physics experiments^1,2, to high-precision metrology^3,4 and to quantum technology^5,6. Until now, sympathetic cooling has required close-range Coulomb interactions^7,8, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps^5,9,10, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. Here we demonstrate sympathetic cooling of a single proton using laser-cooled Be⁺ ions in spatially separated Penning traps. The traps are connected by a superconducting LC circuit that enables energy exchange over a distance of 9 cm. We also demonstrate the cooling of a resonant mode of a macroscopic LC circuit with laser-cooled ions and sympathetic cooling of an individually trapped proton, reaching temperatures far below the environmental temperature. Notably, as this technique uses only image–current interactions, it can be easily applied to an experiment with antiprotons¹, facilitating improved precision in matter–antimatter comparisons¹¹ and dark matter searches^12,13.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): Max Planck Institute for Nuclear Physics
Ulmer Fundamental Symmetries Laboratory
Johannes Gutenberg University Mainz
National Metrology Institute of Germany (PTB)
CERN
University of Tokyo
GSI Helmholtz Centre for Heavy Ion Research
Helmholtz-Institut Mainz
Type: Article
Journal: Nature
Volume: 596
Pages: 514-518
No. of pages: 5
ISSN: 0028-0836
Publication date: 26.08.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General
Electronic version(s): https://doi.org/10.1038/s41586-021-03784-w (Access: Open)

BibTeX

@article{fb0e2f35a6b645299a2bc293dbc470d7,
title = "Sympathetic cooling of a trapped proton mediated by an LC circuit",
abstract = "Efficient cooling of trapped charged particles is essential to many fundamental physics experiments1,2, to high-precision metrology3,4 and to quantum technology5,6. Until now, sympathetic cooling has required close-range Coulomb interactions7,8, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps5,9,10, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. Here we demonstrate sympathetic cooling of a single proton using laser-cooled Be+ ions in spatially separated Penning traps. The traps are connected by a superconducting LC circuit that enables energy exchange over a distance of 9 cm. We also demonstrate the cooling of a resonant mode of a macroscopic LC circuit with laser-cooled ions and sympathetic cooling of an individually trapped proton, reaching temperatures far below the environmental temperature. Notably, as this technique uses only image–current interactions, it can be easily applied to an experiment with antiprotons1, facilitating improved precision in matter–antimatter comparisons11 and dark matter searches12,13.",
author = "{BASE Collaboration} and M. Bohman and V. Grunhofer and C. Smorra and M. Wiesinger and C. Will and Borchert, {M. J.} and Devlin, {J. A.} and S. Erlewein and M. Fleck and S. Gavranovic and J. Harrington and B. Latacz and A. Mooser and D. Popper and E. Wursten and K. Blaum and Y. Matsuda and Christian Ospelkaus and W. Quint and J. Walz and S. Ulmer",
note = "Funding Information: Acknowledgements This study comprises parts of the PhD thesis work of M.B. We acknowledge the contributions of G. L. Schneider and N. Sch{\"o}n to the design and construction of the Penning-trap system. We thank S. Sturm for helpful discussions regarding the cooling method presented here and acknowledge similar developments toward cooling highly charged ions in the ALPHATRAP collaboration. We acknowledge financial support from the RIKEN Chief Scientist Program, RIKEN Pioneering Project Funding, the RIKEN JRA Program, the Max-Planck Society, the Helmholtz-Gemeinschaft, the DFG through SFB 1227 {\textquoteleft}DQ-mat{\textquoteright}, the European Union (Marie Sk{\l}odowska-Curie grant agreement number 721559), the European Research Council under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (Grant agreement numbers 832848-FunI and 852818-STEP) and the Max-Planck-RIKEN-PTB Center for Time, Constants and Fundamental Symmetries.",
year = "2021",
month = aug,
day = "26",
doi = "10.1038/s41586-021-03784-w",
language = "English",
volume = "596",
pages = "514--518",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7873",
}