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 show that the curvature/isocurvature perturbation gives stringent constraint on this scenario and no consistent parameter space is found in a minimal setup.