Deep-Ultraviolet Frequency Metrology of H2 for Tests of Molecular Quantum Theory

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Molecular hydrogen and its isotopic and ionic species are benchmark systems for testing quantum chemical theory. Advances in molecular energy structure calculations enable the experimental verification of quantum electrodynamics and potentially a determination of the proton charge radius from H2 spectroscopy. We measure the ground state energy in ortho-H2 relative to the first electronically excited state by Ramsey-comb laser spectroscopy on the EF1Σg+-X1Σg+(0,0) Q1 transition. The resulting transition frequency of 2 971 234 992 965(73) kHz is 2 orders of magnitude more accurate than previous measurements. This paves the way for a considerably improved determination of the dissociation energy (D0) for fundamental tests with molecular hydrogen.

Original languageEnglish
Article number043204
JournalPhysical Review Letters
Volume120
Issue number4
DOIs
Publication statusPublished - 25 Jan 2018

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quantum theory
metrology
hydrogen
quantum electrodynamics
laser spectroscopy
energy
dissociation
radii
ground state
protons
spectroscopy
excitation

Cite this

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title = "Deep-Ultraviolet Frequency Metrology of H2 for Tests of Molecular Quantum Theory",
abstract = "Molecular hydrogen and its isotopic and ionic species are benchmark systems for testing quantum chemical theory. Advances in molecular energy structure calculations enable the experimental verification of quantum electrodynamics and potentially a determination of the proton charge radius from H2 spectroscopy. We measure the ground state energy in ortho-H2 relative to the first electronically excited state by Ramsey-comb laser spectroscopy on the EF1Σg+-X1Σg+(0,0) Q1 transition. The resulting transition frequency of 2 971 234 992 965(73) kHz is 2 orders of magnitude more accurate than previous measurements. This paves the way for a considerably improved determination of the dissociation energy (D0) for fundamental tests with molecular hydrogen.",
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Deep-Ultraviolet Frequency Metrology of H2 for Tests of Molecular Quantum Theory. / Altmann, R. K.; Dreissen, L. S.; Salumbides, E. J.; Ubachs, W.; Eikema, K. S.E.

In: Physical Review Letters, Vol. 120, No. 4, 043204, 25.01.2018.

Research output: Contribution to JournalArticleAcademicpeer-review

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