Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Phys Rev Lett. 2011 Jul 8;107(2):023002. doi: 10.1103/PhysRevLett.107.023002. Epub 2011 Jul 7.
We determined the experimental value of the g factor of the electron bound in hydrogenlike ²⁸Si¹³⁺ by using a single ion confined in a cylindrical Penning trap. From the ratio of the ion's cyclotron frequency and the induced spin flip frequency, we obtain g = 1.995 348 958 7(5)(3)(8). It is in excellent agreement with the state-of-the-art theoretical value of 1.995 348 958 0(17), which includes QED contributions up to the two-loop level of the order of (Zα)² and (Zα)⁴ and represents a stringent test of bound-state quantum electrodynamics calculations.
我们通过将单个离子限制在圆柱形彭宁阱中，测定了束缚在类氢离子 ²⁸Si¹³⁺中的电子 g 因子的实验值。从离子的回旋频率与诱导自旋翻转频率的比值，我们得到 g = 1.9953489587(5)(3)(8)。它与最先进的理论值 1.9953489580(17)非常吻合，该理论值包括 QED 贡献，精度达到（Zα）²和（Zα）⁴的两圈水平，这对束缚态量子电动力学计算是一个严格的检验。
