Oscillating Spin-2 Dark Matter
  We show that the coherent oscillations of a spin-2 field from bimetric theory
can easily account for the observed dark matter abundance. We obtain the
equation of motion for the field in a cosmological setting and discuss in
detail the phenomenology of the model. The framework is testable in precision
measurements of oscillating electric charge in atomic clocks, using atomic
spectroscopy and in dedicated resonant mass detectors as well as in
axion-like-particles experiments, which therefore provide a new window to probe
and test gravity itself. We also comment on possible multimetric extensions of
the framework that straightforwardly implement the clockwork mechanism for
gravity.
