  In this paper we demonstrate a route to develop coherence in a system of
non-driven oscillators. Here, the coherence is brought about via physical
collisions through which the oscillators exchange energy. While coherence in
the classical situations occurs due to sustained coupling terms in the
dynamical equations, collision-induced coherence is enabled solely through
strong interactions that are of intermittent nature! We demonstrate this in a
Newton's cradle arrangement of oscillators by electrical and optical studies
under ambient and vacuum conditions.
