Inserting single Cs atoms into an ultracold Rb gas

TL;DR

This paper demonstrates the controlled insertion of individual Cs atoms into an ultracold Rb gas, enabling potential quantum interactions between single atoms and quantum gases.

Contribution

It introduces a method to combine single-atom control with ultracold quantum gases, facilitating coherent interactions between different atomic species.

Findings

Successful insertion of single Cs atoms into Rb gas

Preparation of separated traps for different atomic species

Potential for studying quantum interactions between single atoms and gases

Abstract

We report on the controlled insertion of individual Cs atoms into an ultracold Rb gas at about 400 nK. This requires to combine the techniques necessary for cooling, trapping and manipulating single laser cooled atoms around the Doppler temperature with an experiment to produce ultracold degenerate quantum gases. In our approach, both systems are prepared in separated traps and then combined. Our results pave the way for coherent interaction between a quantum gas and a single or few neutral atoms of another species.