  Impurity physics is a traditional topic in condensed matter physics that
nowadays is being explored in the field of ultracold gases. Among the different
classes of impurities, we focus on charged impurities in an ultracold bath.
When a single ion is brought in contact with an ultracold gas it is subjected
to different reactive processes that can be understood from a cold chemistry
approach. In this work, we present an outlook of approaches for the dynamics of
a single ion in a bath of ultracold atoms or molecules, complementing the usual
many-body approaches characteristic of impurity physics within condensed matter
physics. In particular, we focus on the evolution of a charged impurity in
different baths, including external time-dependent trapping potentials and we
explore the effect of the external laser sources present in ion-neutral hybrid
traps into the lifetime of an impurity.
