Conveners
Session 4: QED tests on atoms and molecules
- Zoltan Laszlo Trocsanyi (University of Debrecen (HU))
The fundamental interactions theories can be verified at the low energy scale
by comparison of accurate calculations of atomic transition frequencies with experimental values.
Helium atom has several, so called forbidden transitions, which can be accurately measured.
I will present results of very accurate calculations of these transitions with comparison
to the most recent measurements and...
Precision spectroscopy in few-body atomic systems, like hydrogen and helium, enables the testing of the quantum electrodynamics(QED) theory and determination of the fundamental physical constants, such as the Rydberg constant, the proton charge radius, and the fine-structure constant.We perform an laser spectroscopy measurement of the $2^3$S-$2^3$P transition of $^4He$ in an atomic beam.The...
Theoretical studies of hydrogen molecule is the cornerstone of ultraprecise quantum chemistry. Due to its simplicity, the achieved precision is the highest among all molecules and still has a potential of significant enhancement. This high precision of theoretical predictions for hydrogen molecules allows to improved tests of quantum electrodynamics (QED), and opens perspectives for...
Molecular hydrogen has evolved into a benchmark quantum test system for fundamental physics. Recent independent sub-Doppler determinations [1,2] of the weak dipole R(1) transition in the (2,0) overtone band of HD at λ∼1.38 μm yield a discrepancy of 900 kHz or 9σ in combined uncertainty. We present measurements using Noise-Immune Cavity-Enhanced Optical Heterodyne Molecular Spectroscopy...
Theoretical energy separation (ionization, dissociation, transition energy) is composed of several
additive components. The total energy and its components for a light molecule can be well
described in the framework of the nonrelativistic quantum electrodynamic theory (NRQED) [1]
by the expansion in powers of the fine structure constant. The higher accuracy is expected,
the more components...
Determination of the dissociation energy of para-H2
J. Hussels, C.-F.Cheng, K.S.E. Eikema, E.J. Salumbides, W. Ubachs, Department of Physics and Astronomy, VU Amsterdam; N.J. Hölsch, M. Beyer, F. Merkt, Laboratorium für Physikalische Chemie, ETH Zurich; S.-M. Hu, Hefei National Laboratory for Physical Science at the Microscale, USTC, C. Jungen, UCL, London
The dissociation energy (D0) of H2...
