Frequency metrology of the HD+ molecular ion: THz and vibrational spectroscopy at the 10-10 accuracy level

HD 分子离子的频率计量：精度为 10-10 级的太赫兹和振动光谱

• 批准号: 66475571
• 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: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/66475571?language=en
• 关键词: Frequency; metrology; HD+; molecular; ion

The HD+ molecule is of fundamental importance because it is one of the simplest molecules, containing just a single electron. Precise measurement of its vibrational transition frequencies will ultimately allow (i) to test theoretical methods of precision calculation of molecular levels; (ii) establish a new System allowing to measure QED effects / test QED theory in molecules; (iii) to determine the ratio of electron-to-proton mass in a novel way and with potentially higher precision than with alternative methods; (iv) to measure nuclear properties such as quadrupole moments, (v) to test the time-independence of nuclear mass ratios.We have recently performed ro-vibrational spectroscopy and measured the transition frequency with a relative accuracy of 2.3 parts per billion (ppb). Our experimental result is in agreement with theoretical predicitions that were obtained shortly before and allowed the determination of QED contributions of order α4 to about 10% accuracy.In this proposal, we intend to introduce several major experimental improvements in order to reach an accuracy close to the level of 2 parts in 1010 (0.2 ppb), a tenfold improvement. At this level of accuracy, the experimental results will challenge an improved theoretical formulation and calculation of the QED and hyperfine effects. Our measurements could lead to an alternative determination of the electron-to-proton mass ratio, with an accuracy similar to that of currently established approaches.Apart from this application in metrology, the new methods to be developed in the proposed project are of wide interest since they will be applicable to a large variety of other molecular ions.

HD+分子是最简单的分子之一，精确测量了s振动转换，最终允许（i）测试测试的理论方法的精确计算，以便对分子进行精确计算；比替代方法（IV）更高的精度； 2.3零件每十亿零件（PPB）。在1010（0.2 ppb）的2部分中的2个部分中，实验结果将挑战QED和超细效应的理论形式计算的挑战。 - 质量比与当前的准确性相似。

项目成果

Precision spectroscopy of the molecular ion HD + : Control of Zeeman shifts

分子离子 HD 的精密光谱：塞曼位移的控制

• DOI: 10.1103/physreva.82.055401
• 发表时间: 2010
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: D. Bakalov;V. I. Korobov;S. Schiller
• 通讯作者: S. Schiller

All-optical preparation of molecular ions in the rovibrational ground state

• DOI: 10.1038/nphys1605
• 发表时间: 2010-04
• 期刊: Nature Physics
• 影响因子: 19.6
• 作者: T. Schneider;B. Roth;H. Duncker;I. Ernsting;S. Schiller

Magnetic field effects in the transitions of the HD+ molecular ion and precision spectroscopy

HD 分子离子跃迁中的磁场效应和精密光谱

• DOI: 10.1088/0953-4075/44/2/025003
• 发表时间: 2011
• 期刊: Journal of Physics B: Atomic, Molecular and Optical Physics
• 作者: D. Bakalov;V. I. Korobov;S. Schiller
• 通讯作者: S. Schiller