Titre :

Precise test of quantum electrodynamics and determination of fundamental constants with HD+ ions

Auteur(s) :

Alighanbari, S. [Auteur]
Institut fur Experimentalphysik
Giri, G. S. [Auteur]
Institut fur Experimentalphysik
Constantin, Florin Lucian [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Institut fur Experimentalphysik
Korobov, V. I. [Auteur]
Bogoliubov Laboratory of Theoretical Physics [Dubna] [BLTP]
Schiller, S. [Auteur]
Institut fur Experimentalphysik

Titre de la revue :

Nature

Pagination :

152-158

Éditeur :

Nature Publishing Group

Date de publication :

2020

ISSN :

0028-0836

Discipline(s) HAL :

Physique [physics]/Physique Quantique [quant-ph]

Résumé en anglais : [en]

Bound three-body quantum systems are important systems for fundamental physics. They enable tests of quantum electrodynamics theory and provide access to the fundamental constants of atomic physics and to nuclear properties. ...
Lire la suite >Bound three-body quantum systems are important systems for fundamental physics. They enable tests of quantum electrodynamics theory and provide access to the fundamental constants of atomic physics and to nuclear properties. Molecular hydrogen ions, the simplest molecules, are representatives of this class. The metastability of the vibration–rotation levels in their ground electronic states offers the potential for extremely high spectroscopic resolution. Consequently, these systems provide independent access to the Rydberg constant (R_∞), the ratios of electron mass to proton mass (m_e/m_p) and electron mass to deuteron mass (m_e/m_d), proton and deuteron nuclear radii, and high-level tests of quantum electrodynamics. Conventional spectroscopy techniques for molecular ions have long been unable to provide precision competitive with that of ab initio theory, which has strongly improved in recent years. Here we improve our rotational spectroscopy technique for a sympathetically cooled cluster of molecular ions stored in a linear radiofrequency trap by nearly two orders in accuracy. We measured a set of hyperfine components of the rotational transition. An evaluation resulted in the most accurate test of a quantum-three-body prediction so far, at the level of 5 × 10^(−11), limited by the current uncertainties of the fundamental constants. We determined the value of the fundamental constants R∞.m_e(1/m_p+1/m_d) and m_e/m_p with a fractional uncertainty of 2 × 10^(−11), in agreement with but more precise than current CODATA2018 values. These results are also strong evidence of the correctness of previous key high-precision measurements. Furthermore, our work yields a more than 20-fold stronger bound for a hypothetical fifth force between a proton and a deuteron.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL