Spontaneous symmetry breaking in cosmos: The hybrid symmetron as a dark
  energy switching device
  We consider symmetron model in a generalized background with a hope to make
it compatible with dark energy. We observe a "no go" theorem at least in case
of a conformal coupling. Being convinced of symmetron incapability to be dark
energy, we try to retain its role for spontaneous symmetry breaking and assign
the role of dark energy either to standard quintessence or $F(R)$ theory which
are switched on by symmetron field in the symmetry broken phase. The scenario
reduces to standard Einstein gravity in the high density region. After the
phase transition generated by symmetron field, either the $F(R)$ gravity or the
standard quintessence are induced in the low density region. we demonstrate
that local gravity constraints and other requirements are satisfied although
the model could generate the late-time acceleration of Universe.
