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By considering Hadamard vacuum states, we first construct the two-pointfunctions associated with Stueckelberg massive electromagnetism in de Sitterand anti-de Sitter spacetimes. Then, from the general formalism developed in[A. Belokogne and A. Folacci, Phys. Rev. D \textbf{93}, 044063 (2016)], weobtain an exact analytical expression for the vacuum expectation value of therenormalized stress-energy tensor of the massive vector field propagating inthese maximally symmetric spacetimes.

Stueckelberg massive electromagnetism in de Sitter and anti-de Sitter spacetimes: Two-point functions and renormalized stress-energy tensors