Low-temperature scattering with the R-matrix method: from nuclear scattering to atom-atom scattering and beyond

Abstract

The R-matrix method is a fully-quantum time-independent scattering method, used to simulate nuclear, electron-atom, electron-ion, electron-molecule scattering and more. Here, a novel R-matrix method, RmatReact, is presented as applied to ultracold (sub-Kelvin) atom-atom scattering. This is in response to experimental methods which in recent decades have facilitated the routine use of ultracold atoms and small molecules in experiments. This project lays the groundwork for future codes to eventually simulate polyatom-polyatom reactive collisions. Results are presented in this paper for numerical comparisons to other established methods, and for resonances in the elastic scattering of ultracold argon atoms.

arXiv comment18 pages, 3 figures, 2 tables, EFB conference preceedings

References in corpus (10)

• Feshbach Resonances in Ultracold Gases
• Laser cooling of a diatomic molecule
• Laser cooling and slowing of CaF molecules
• Cold hybrid ion-atom systems
• Duo: a general program for calculating spectra of diatomic molecules
• Evaporative cooling of the dipolar radical OH
• MOLSCAT: a program for non-reactive quantum scattering calculations on atomic and molecular collisions
• An R-matrix package for coupled-channel problems in nuclear physics
• Dramatic reductions in inelastic cross sections for ultracold collisions near Feshbach resonances
• Low-temperature chemistry using the R-matrix method