7 papers
Determination of fundamental properties of nitrogen from first principles. III. Temperature and frequency dependence of the molecular polarizability and magnetic susceptibility
Jakub Lang, Giovanni Garberoglio, MichaÅ Przybytek +1
This work is the third part of the series of papers that focus on the theoretical determination of the properties of nitrogen that are relevant in metrology. Here we present first-…
Determination of fundamental properties of nitrogen from first principles. II. Interaction potential and spectroscopic properties of N
Jakub Lang, MichaÅ Przybytek, MichaÅ Lesiuk
This work is the second part of the series devoted to first-principles determination of the fundamental properties of nitrogen. In this part, we calculate the potential energy curv…
Determination of fundamental properties of nitrogen from first principles. I. Atomic polarizabilities and long-range dispersion coefficients
MichaÅ Przybytek, Jakub Lang, MichaÅ Lesiuk
This work is the first in a series of papers in which we perform theoretical calculations of various fundamental properties of nitrogen relevant for gas thermometry experiments. In…
Density effects in precision laser spectroscopy of exotic helium atoms
Hubert J. Jóźwiak, Dimitar Bakalov, MichaŠPrzybytek +2
Exotic helium atoms act as unique atomic traps for heavy, negatively charged particles, protecting them from nuclear annihilation and nuclear capture on timescales long enough to e…
Quantum calculation of the collision-induced line-shape effects in antiprotonic helium and the new accurate ab initio He-He potential energy surface
Hubert J. Jóźwiak, Dimitar Bakalov, MichaŠPrzybytek +2
We present the first fully ab initio calculations of collision-induced broadening and shift of spectral lines in antiprotonic helium (He) perturbed by atomic helium.…
First-Order Symmetry-Adapted Perturbation Theory with Double Exchange for Multireference Systems
Dominik CieÅliÅski, MichaÅ Przybytek, Grzegorz ChaÅasiÅski +1
We extend first-order multiconfigurational symmetry-adapted perturbation theory, SAPT(MC), [Hapka M. et al. JCTC, 2021, 17], to account for double-exchange effects, where up to two…