Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD(.).
Probing QED and fundamental constants through laser spectroscopy of vibrational transitions in HD(.).
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DOI：
10.1038/ncomms10385
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发表时间：
2016-01-27
影响因子：
16.6
通讯作者：
Koelemeij JC
中科院分区：
文献类型：
--
作者：
Biesheuvel J;Karr JP;Hilico L;Eikema KS;Ubachs W;Koelemeij JC
自然界中最简单的分子，以H2+和HD+形式存在的分子氢离子，为复杂形式物质的量子电动力学测试提供了一个重要的基准系统。在这里，我们报告了一种基于激光光谱学测量HD+中振动泛音跃迁的频率的测试。我们发现理论频率和实验频率在0.6(1.1)ppb以内，这是迄今为止对分子理论最严格的检验。我们的测量不仅证实了分子中高阶量子电动力学的有效性，而且还使长期预测的从分子系统确定质子与电子的质量比成为可能，并改进了对假设的第五力和分子尺度上压缩的更高维度的约束。从十亿分之一的理论和实验比较的角度，我们的工作证明了分子氢离子作为基本物理常数和定律的探测器的潜力。分子氢离子是自然界中最简单的分子，它构成了复杂物质形式下量子电动力学测试的基准系统。在这里，作者报告了对HD+跃迁的激光光谱频率测量，与理论符合0.6(1.1)ppb/十亿。
The simplest molecules in nature, molecular hydrogen ions in the form of H2+ and HD+, provide an important benchmark system for tests of quantum electrodynamics in complex forms of matter. Here, we report on such a test based on a frequency measurement of a vibrational overtone transition in HD+ by laser spectroscopy. We find that the theoretical and experimental frequencies are equal to within 0.6(1.1) parts per billion, which represents the most stringent test of molecular theory so far. Our measurement not only confirms the validity of high-order quantum electrodynamics in molecules, but also enables the long predicted determination of the proton-to-electron mass ratio from a molecular system, as well as improved constraints on hypothetical fifth forces and compactified higher dimensions at the molecular scale. With the perspective of comparisons between theory and experiment at the 0.01 part-per-billion level, our work demonstrates the potential of molecular hydrogen ions as a probe of fundamental physical constants and laws. Molecular hydrogen ions, the simplest molecules in nature, constitute a benchmark system for tests of quantum electrodynamics in complex forms of matter. Here, the authors report on a laser spectroscopic frequency measurement of a transition in HD+ in agreement with theory within 0.6 (1.1) part-per-billion.