Molecular frequency metrology: ultra-high precision spectroscopy of the rotational transition of HD+

分子频率计量：HD 旋转跃迁的超高精度光谱

• 批准号: 407129616
• 负责人: Professor Stephan Schiller, Ph.D.
• 金额: --
• 依托单位: Institut für Experimentalphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/407129616?language=en
• 关键词: Molecular; frequency; metrology; ultra; precision

Precision spectroscopy of molecular hydrogen ions provides an approach for determining several fundamental constants of atomic physics by alternative spectroscopic means. Until recently, the spectroscopy of these molecular ions was limited by Doppler broadening, which also limited the achievable precision. In the group of the applicant a new rotational spectroscopy technique was recently developed, which achieves the Lamb-Dicke regime. The spectral resolution was a factor 40 below the Doppler broadening. With this breakthrough important new perspectives open up in precision spectroscopy. In this project, the technique shall be developed further both in terms of resolution (by a factor 10) and in terms of accuracy (by a factor 100). Several experimental extensions shall be tested and characterized.As outcome, the project shall determine one rotational frequency and two hyperfine splittings in the molecule HD+, with fractional uncertainty 2×10^-11 relative to the rotational frequency. In parallel, the cooperation partners will develop the ab initio theory of the spin-dependent energy contributions further. By comparing the experimental and theoretical results we intend to test the ab initio quantum theory with a fractional uncertainty of 3×10^-11, 30 times more accurately than so far.The results will also be used to determine the ratio of electron mass to reduced proton-deuteron-mass, me/mp + me/md. The goal uncertainty, 3×10^-11, will allow to independently confirm the most precise value, obtained in Penning traps. If agreement is found, both values together can lead to an improved value for the CODATA fundamental constants compilation.

分子氢离子的精确光谱通过替代性源自介质的光谱限制了这些分子离子的光谱限制了多普勒宽阔的纽扣，这是一种新的杂物，这是一种新的分子离子的限制。达到羔羊型，以这种突破性的斑点在精确的光谱中开放。分子HD+中的超精细分裂，分数单位的abeotiootiootioootio）进一步提出了自旋依赖性能量的贡献，我们打算用3×10^-1，1，1，traction的理论结果来测试量子量子理论比到底更准确的30倍。要脚趾，在penning陷阱中获得的最精确的值会导致提高塔塔基本汇编的值。