QED effects in molecules: test on rotational quantum states of H${}_2$

Abstract

Quantum electrodynamic effects have been systematically tested in the progression of rotational quantum states in the $X^1{\Sigma }_g^{+},v=0$ vibronic ground state of molecular hydrogen. High-precision Doppler-free spectroscopy of the $E{F}^1{\Sigma }_g^{+}-X^1{\Sigma }_g^{+}$ (0,0) band was performed with 0.005 cm${}^{-1}$ accuracy on rotationally-hot H${}_2$ (with rotational quantum states J up to 16). QED and relativistic contributions to rotational level energies as high as 0.13 cm${}^{-1}$ are extracted, and are in perfect agreement with recent calculations of QED and high-order relativistic effects for the H${}_2$ ground state.

4 pages, 3 figures, to be published in Physical Review Letters

References in corpus (3)

• Extreme ultraviolet frequency comb metrology
• Spectroscopy of atomic hydrogen. How is the Rydberg constant determined?
• Relativistic corrections of mα^6(m/M) order to the hyperfine structure of the H_2^+ molecular ion

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