  We analyse the Klein-Gordon oscillator in a cosmic string space-time and
study the effects stemming from the rotating frame and non-commutativity in
momentum space. We show that the latter mimics a constant magnetic field,
imparting physical interpretation to the setup. The field equation for the
scalar field is solved via separations of variables, and we obtain quantization
of energy and angular momentum. The space-time metric is non-degenerate as long
as the particle is confined within a hard-wall, whose position depends on the
rotation frame velocity and the string mass parameter. We investigate the
energy quantization both for a finite hard-wall (numerical evaluation) and in
the limit of an infinite hard-wall (analytical treatment). We stress the effect
of non-commutativity upon the energy quantization in each case.
