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来自四体非绝热指数波函数的相对论修正。

Relativistic Correction from the Four-Body Nonadiabatic Exponential Wave Function.

作者信息

Pachucki Krzysztof, Komasa Jacek

机构信息

Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.

Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.

出版信息

J Chem Theory Comput. 2024 Oct 8;20(19):8644-8651. doi: 10.1021/acs.jctc.4c00861. Epub 2024 Sep 26.

DOI:10.1021/acs.jctc.4c00861
PMID:39327784
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11465460/
Abstract

We present a method for calculating the relativistic correction in hydrogen molecules that significantly exceeds the accuracy of all the previous literature results. This method utilizes the explicitly correlated nonadiabatic exponential wave function, and thus treats electrons and nuclei equivalently. The proposed method can be applied to any rovibrational state, including highly excited ones. The numerical precision of the relativistic correction reaches several kHz (∼10 cm), which is below the best experimental accuracy.

摘要

我们提出了一种计算氢分子相对论修正的方法,该方法的精度显著超过了此前所有文献结果的精度。此方法利用了显式相关的非绝热指数波函数,从而对电子和原子核进行等效处理。所提出的方法可应用于任何振转态,包括高激发态。相对论修正的数值精度达到了几千赫兹(约10厘米),低于最佳实验精度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc31/11465460/3b4083ab1ac5/ct4c00861_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc31/11465460/c311735a04b4/ct4c00861_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc31/11465460/3b4083ab1ac5/ct4c00861_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc31/11465460/c311735a04b4/ct4c00861_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc31/11465460/3b4083ab1ac5/ct4c00861_0002.jpg

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Precision Measurement of Vibrational Quanta in Tritium Hydride.
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Lamb Dip of a Quadrupole Transition in H_{2}.氢分子中四极跃迁的兰姆凹陷
Phys Rev Lett. 2023 Aug 18;131(7):073001. doi: 10.1103/PhysRevLett.131.073001.
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The high-accuracy spectroscopy of H rovibrational transitions in the (2-0) band near 1.2 μm.在近 1.2μm 的(2-0)波段中,H 转动振动跃迁的高精度光谱学。
Phys Chem Chem Phys. 2023 May 31;25(21):14749-14756. doi: 10.1039/d3cp01136d.
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The (2-0) (0) and (1) transition frequencies of HD determined to a 10 relative accuracy by Doppler spectroscopy at 80 K.通过在80K下的多普勒光谱法,以10的相对精度确定了HD的(2-0)(0)和(1)跃迁频率。
Phys Chem Chem Phys. 2022 Oct 5;24(38):23164-23172. doi: 10.1039/d2cp02151j.
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Sub-ppb Measurement of a Fundamental Band Rovibrational Transition in HD.
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Ultrahigh finesse cavity-enhanced spectroscopy for accurate tests of quantum electrodynamics for molecules.用于分子量子电动力学精确测试的超高精细度腔增强光谱学。
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