QED with heavy ions: on the way from strong to supercritical fields

V. Shabaev, A. I. Bondarev, D. Glazov, Y. Kozhedub, I. A. Maltsev, A. Malyshev, R. V. Popov, D. Tumakov, I. Tupitsyn
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引用次数: 2

Abstract

The current status of tests of quantum electrodynamics with heavy ions is reviewed. The theoretical predictions for the Lamb shift and the hyperfine splitting in heavy ions are compared with available experimental data. Recent achievements and future prospects in studies of the $g$ factor with highly charged ions are also reported. These studies can provide precise determination of the fundamental constants and tests of QED within and beyond the Furry picture at the strong-coupling regime. Theoretical calculations of the electron-positron pair creation probabilities in low-energy heavy-ion collisions are also considered. Special attention is paid to tests of QED in supercritical-field regime, which can be accessed in slow collisions of two bare nuclei with the total charge number larger than the critical value, $Z_{\rm crit} \approx 173$. In the supercritical field, the initially neutral vacuum can spontaneously decay into the charged vacuum and two positrons. It is demonstrated that this fundamental phenomenon can be observed via impact-sensitive measurements of the pair-production probabilities.
重离子QED:从强场到超临界场
综述了重离子量子电动力学实验的研究现状。对重离子中兰姆位移和超细分裂的理论预测与现有的实验数据进行了比较。本文还报道了高电荷离子的$g$因子研究的最新成果和未来展望。这些研究可以提供基本常数的精确测定,并在强耦合状态下对毛茸茸图像内外的QED进行测试。本文还考虑了低能重离子碰撞中电子-正电子对产生概率的理论计算。特别注意了在超临界场状态下的QED测试,它可以在两个裸核的慢碰撞中获得,总荷数大于临界值,约为173。在超临界场中,最初的中性真空可以自发地衰变成带电真空和两个正电子。结果表明,这一基本现象可以通过对生产概率的冲击敏感测量来观察到。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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