  Resolved sideband cooling provides a crucial step in subrecoil cooling the
trapped atoms toward their motional ground state, which is essential in
atom-based quantum technologies. Here we present an enhanced dark-state
sideband cooling in trapped atoms utilizing photon-mediated dipole-dipole
interactions among them. By placing the atoms at the magic interparticle
distances, we manifest an outperformed cooling behavior in the target atom,
which surpasses the limit that a single atom permits. We further investigate
various atomic configurations in a multiatom setup with a laser detuning and
different light polarization angles, where multiple magic spacings can be
identified and a moderate improvement in cooling performance is predicted as
the number of atoms increases. Our results provide insights to subrecoil
cooling of atoms with collective and light-induced long-range dipole-dipole
interactions, and pave the way toward implementing genuine quantum operations
in multiple quantum registers.
