Speaker
Mr
Joschka Wolf
(Institut für Quantenmaterie, Universität Ulm)
Description
We investigate the interaction of a laser-cooled trapped ion ($^{138}$Ba$^+$, $^{87}$Rb$^+$ or $^{87}$Rb$_2^+$) with an ultra-cold cloud of optically confined $^{87}$Rb atoms. The ion is held in a linear Paul trap and is immersed in the center of
the cold atomic cloud.
By controlling a set of parameters, like changing the micromotion energy, we can manipulate the atom-ion collisions and investigate elastic and inelastic collision phenomena. Using the cold atom gas we can achieve sympathetic cooling of the $^{138}$Ba$^+$ to sub-Doppler temperatures (sub mK).
To be able to measure the energy after collisions precisely we are setting up a resolved sideband system for the $^{138}$Ba$^+$ ion which I will present.
Another project is to implement a dipole trap at 493 nm for the $^{138}$Ba$^+$ ion and to switch off the Paul trap during the atom ion interaction in order to remove the micromotion completely.
Primary author
Mr
Joschka Wolf
(Institut für Quantenmaterie, Universität Ulm)
Co-authors
Mr
Amir Mahdian
(Institut für Quantenmaterie, Universität Ulm)
Mr
Amir Mohammadi
(Institut für Quantenmaterie, Universität Ulm)
Mr
Artjom Krükow
(Institut für Quantenmaterie, Universität Ulm)
Prof.
Johannes Hecker Denschlag
(Institut für Quantenmaterie, Universität Ulm)
