  Kinetically constrained spin systems play an important role in understanding
key properties of the dynamics of slowly relaxing materials, such as glasses.
So far kinetic constraints have been introduced in idealised models aiming to
capture specific dynamical properties of these systems. However, recently it
has been experimentally shown by [M. Valado et al., arXiv:1508.04384 (2015)]
that manifest kinetic constraints indeed govern the evolution of strongly
interacting gases of highly excited atoms in a noisy environment. Motivated by
this development we address and discuss the question concerning the type of
kinetically constrained dynamics which can generally emerge in quantum spin
systems subject to strong noise. We discuss an experimentally-realizable case
which displays collective behavior, timescale separation and dynamical
reducibility.
