SAMOP 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 2: Collisions, Scattering and Correlation Phenomena

A 2.7: Vortrag

Montag, 6. März 2023, 12:30–12:45, F107

Search for Exotic Molecules in Rydberg Positronium-Neutral Atom Mixtures — •Milena Simić and Matthew Eiles — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

The interaction between a Rydberg atom and a distant ground-state atom can bind the two atoms together into a long-range Rydberg molecule. The mechanism behind this interaction is the scattering of the low-energy Rydberg electron off of the ground-state atom. By replacing the Rydberg atom with Rydberg positronium, an additional interaction plays a role. This interaction, between the positron and the neutral atom, is also determined by low-energy scattering phase shifts, but now of the positron off of the ground state atom. These phase shifts, like those of electrons, have been computed for a variety of atoms. In this talk, we discuss the prospects of forming exotic long-range Rydberg molecules composed of both matter and antimatter. Compared to normal long-range Rydberg molecules, the replacement of the heavy atomic core with a positron brings new physics into play: the molecular bond is now determined by two scattering processes instead of one, the reduced mass of the molecule is very light, and the decay channel opened by annihilation could be significant.