Curiosity about the dust matter in the cosmological context
  We propose a model for the dust matter in the cosmological context. The model
contains a scalar field with a kinetic term nonminimally coupled to gravity. By
investigating the background and perturbative equations, it is demonstrated
that the scalar field has the same dynamics as the dust matter. We have also
considered the cosmological constant in the model. It turns out that the model
has not exotic behavior. Thus, a universe including the scalar field and the
cosmological constant evolves just as our Universe. Moreover, we have added the
quadratic term in the action. It is shown that the quadratic term can be ruled
out by its consequences.
