Rydberg atom-ion collisions in cold environments

Abstract

Low-energy collisions of Rydberg atom-ion systems are investigated theoretically. We present the parameter space associated with suitable approaches for the dynamics of Rydberg atom-ion collisions, i.e. quantum-, Langevin and classical exchange regimes, showing that for the lowest reachable temperatures a classical treatment is appropriate. A quasi-classical trajectory method is used to study charge exchange cross sections for Li${}^{\ast }$-Li${}^{+}$ and Li${}^{\ast }$-Cs${}^{+}$ at collision energies down to $1$K. For cold collisions we find the charge exchange cross section deviating from the $n^4$ geometric scaling. Furthermore, for low-energy collisions, we find both an influence of the ionic core-repulsion as well as variations for two different models used for describing the electron-core potential.

7 pages, 7 figures

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Cited by in corpus (6)

• Long-range Rydberg-atom-ion molecules of Rb and Cs
• Long-range atom-ion Rydberg molecule: A novel molecular binding mechanism
• Cold chemistry: a few-body perspective on impurity physics of a single ion in an ultracold bath
• Non-adiabatic decay of Rydberg-atom-ion molecules
• Cold atom-ion systems in radiofrequency multipole traps: event-drive molecular dynamics and stochastic simulations
• Non-resonant inter-species interaction and its effect on the position response function of cold atoms