Ultra-high finesse cavity-enhanced spectroscopy for accurate tests of quantum electrodynamics for molecules

We report the most accurate measurement of the position of the weak quadrupole S(2) 2-0 line in D\(_2\). The spectra were collected with a frequency-stabilized cavity ring-down spectrometer (FS-CRDS) with an ultra-high finesse optical cavity (\(\mathcal{F}\) = 637 000) and operating in the frequency...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Zaborowski, M, Słowiński, M, Stankiewicz, K, Thibault, F, Cygan, A, Jóźwiak, H, Kowzan, G, Masłowski, P, Nishiyama, A, Stolarczyk, N, Wójtewicz, S, Ciuryło, R, Lisak, D, Wcisło, P
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 27.01.2020
Subjects
Cavity ringdown
Physics - Atomic Physics
Physics - Instrumentation and Detectors
Physics - Optics
Position measurement
Quadrupoles
Quantum electrodynamics
Spectroscopy
Online AccessGet full text

Cover

More Information
Summary:We report the most accurate measurement of the position of the weak quadrupole S(2) 2-0 line in D\(_2\). The spectra were collected with a frequency-stabilized cavity ring-down spectrometer (FS-CRDS) with an ultra-high finesse optical cavity (\(\mathcal{F}\) = 637 000) and operating in the frequency-agile, rapid scanning spectroscopy (FARS) mode. Despite working in the Doppler-limited regime, we reached 40 kHz of statistical uncertainty and 161 kHz of absolute accuracy, achieving the highest accuracy for homonuclear isotopologues of molecular hydrogen. The accuracy of our measurement corresponds to the fifth significant digit of the leading term in QED correction. We observe 2.3\(\sigma\) discrepancy with the recent theoretical value.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.10979