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We consider an atom interacting with the quantized electromagnetic field inthe standard model of non-relativistic QED. The nucleus is supposed to befixed. We prove smoothness of the resolvent and local decay of the photondynamics for quantum states in a spectral interval I just above the groundstate energy. Our results are uniform with respect to I. Their proofs are basedon abstract Mourre's theory, a Mourre inequality established in [FGS1],Hardy-type estimates in Fock space, and a low-energy dyadic decomposition.

Resolvent smoothness and local decay at low energies for the standard model of non-relativistic QED