  It is a common knowledge that an effective interaction of a quantum impurity
with an electromagnetic field can be screened by surrounding charge carriers,
whether mobile or static. Here we demonstrate that very strong, `anomalous'
screening can take place in the presence of a neutral, weakly-polarizable
environment, due to an exchange of orbital angular momentum between the
impurity and the bath. Furthermore, we show that it is possible to generalize
all phenomena related to isolated impurities in an external field to the case
when a many-body environment is present, by casting the problem in terms of the
angulon quasiparticle. As a result, the relevant observables such as the
effective Rabi frequency, geometric phase, and impurity spatial alignment are
straightforward to evaluate in terms of a single parameter: the
angular-momentum-dependent screening factor.
