Electromagnetic vacuum stresses and energy fluxes induced by a cosmic string in de Sitter spacetime

For the electromagnetic field in [Formula: see text]-dimensional locally de Sitter (dS) spacetime, we analyze effects of a generalized cosmic string type defect on vacuum expectation value energy-momentum tensor. Bunch–Davies state, topological contributions are explicitly extracted both diagonal and off-diagonal components. The latter describes presence radially directed energy flux state. It vanishes for text] because conformal invariance is towards text]. stresses anisotropic and, unlike geometry Minkowski along directions parallel to core differ from density. Depending planar angle deficit distance string, corresponding values can be either positive or negative. Near effect gravitational components part weak leading terms respective expansions coincide with background spacetime. spacetime curvature essentially modifies behavior at proper distances larger than dS radius. In that region, energy–momentum tensor decay inverse proportion fourth power density behaves as inverse-fifth all spatial dimension exception special case bulk absent proportional text]th distance.