7 papers
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…
The 2D free particle in the phase space quantum mechanics
Hubert Jóźwiak, Jaromir Tosiek
The Wigner eigenfunctions of a free quantum particle propagating on a plane are derived. Two possibilities are analysed. Firstly, the particle of given energy and angular momentum…
Letokhov-Chebotayev intracavity trapping spectroscopy of H
Wim Ubachs, Frank M. J. Cozijn, Meissa L. Diouf +3
In the early days of laser spectroscopy Letokhov and Chebotayev proposed a scheme for measuring narrow spectral lines where the resolution is not restricted to Doppler effects beca…
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.…
New beyond-Voigt line-shape profile recommended for the HITRAN database
P. WcisÅo, N. Stolarczyk, M. SÅowiÅski +20
Parameters associated with the collisional perturbation of spectral lines are essential for modeling the absorption of electromagnetic radiation in gas media. The HITRAN molecular…
Cavity-enhanced spectroscopy in the deep cryogenic regime -- new hydrogen technologies for quantum sensing
Kamil Stankiewicz, Marcin Makowski, MichaÅ SÅowiÅski +13
Spectrometers based on high-finesse optical cavities have proven to be powerful tools for applied and fundamental studies. Extending this technology to the deep cryogenic regime is…