2018/12/31 by M. Puchalski, J. Komasa. P. Czachorowski, K. Pachucki · 1 citation
Physics and Astronomy · #physics.atom-ph
paper · pdf · doi:10.1103/physrevlett.122.103003
published as Phys. Rev. Lett. 122, 103003 (2019) · 5 pages
arxiv created 2019/04/05 · arxiv updated 2019/04/08
The quantum electrodynamic correction to the energy of the hydrogen molecule has been evaluated without expansion in the electron-proton mass ratio. The obtained results significantly improve the accuracy of theoretical predictions reaching the level of 1 MHz for the dissociation energy, in a very good agreement with the parallel measurement [Hölsch et al., Phys. Rev. Lett. 122, 103002 (2019)]. Molecular hydrogen has thus become a cornerstone of ultraprecise quantum chemistry, which opens perspectives for determination of fundamental physical constants from its spectra.