Constraint on Vector Coherent Oscillation Dark Matter with Kinetic
  Function
  A spatially uniform vector condensate can be formed during inflation if the
vector boson is coupled to the inflaton through nontrivial kinetic function.
The coherent oscillation of such a massive vector boson is a dark matter
candidate. In this paper we consider the case where the vector boson energy
density increases during inflation and show that the curvature/isocurvature
perturbation gives stringent constraint on this scenario.
