RIKEN, Ulmer Fundamental Symmetries Laboratory, Wako, Saitama 351-0198, Japan.
Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover, Germany.
Phys Rev Lett. 2019 Feb 1;122(4):043201. doi: 10.1103/PhysRevLett.122.043201.
We report on the first detailed study of motional heating in a cryogenic Penning trap using a single antiproton. Employing the continuous Stern-Gerlach effect we observe cyclotron quantum transition rates of 6(1) quanta/h and an electric-field noise spectral density below 7.5(3.4)×10^{-20} V^{2} m^{-2} Hz^{-1}, which corresponds to a scaled noise spectral density below 8.8(4.0)×10^{-12} V^{2} m^{-2}, results which are more than 2 orders of magnitude smaller than those reported by other ion-trap experiments.
我们报告了首次在低温彭宁陷阱中使用单个反质子详细研究运动加热的情况。通过连续斯特恩-格拉赫效应，我们观察到回旋量子跃迁率为 6(1)量子/小时，电场噪声谱密度低于 7.5(3.4)×10^{-20}V^{2}m^{-2}Hz^{-1}，这对应于低于 8.8(4.0)×10^{-12}V^{2}m^{-2}的标度噪声谱密度，比其他离子阱实验报告的结果小两个数量级以上。
