Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons

B. M. Latacz; M. Fleck; J. I. Jaeger; G. Umbrazunas; B. P. Arndt; S. R. Erlewein; E. J. Wursten; J. A. Devlin; P. Micke; F. Abbass; D. Schweitzer; M. Wiesinger; C. Will; H. Yildiz; K. Blaum; Y. Matsuda; A. Mooser; C. Ospelkaus; A. Soter; W. Quint; J. Walz; Y. Yamazaki; C. Smorra; S. Ulmer

arXiv · 2404.07928

Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons

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Abstract

We demonstrate efficient sub-thermal cooling of the modified cyclotron mode of a single trapped antiproton and reach particle temperatures $T_+=E_+/k_\text{B}$ below $200\,$mK in preparation times shorter than $500\,$s. This corresponds to the fastest resistive single-particle cyclotron cooling to sub-thermal temperatures ever demonstrated. By cooling trapped particles to such low energies, we demonstrate the detection of antiproton spin transitions with an error-rate $<0.000025$, more than three orders of magnitude better than in previous best experiments. This method will have enormous impact on multi-Penning-trap experiments that measure magnetic moments with single nuclear spins for tests of matter/antimatter symmetry, high-precision mass-spectrometry, and measurements of electron $g$-factors bound to highly-charged ions that test quantum electrodynamics.

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B. M. Latacz, M. Fleck, J. I. Jaeger, G. Umbrazunas, B. P. Arndt, S. R. Erlewein, E. J. Wursten, J. A. Devlin, P. Micke, F. Abbass, D. Schweitzer, M. Wiesinger, C. Will, H. Yildiz, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, A. Soter, W. Quint, J. Walz, Y. Yamazaki, C. Smorra, S. Ulmer. 2024-04-11. Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons. https://arxiv.org/abs/2404.07928

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