Maxwell wave packets in de Sitter expanding universe

Abstract We study for the first time propagation of packets plane waves Maxwell free field in de Sitter expanding universe as detected by an observer staying at rest his proper frame with physical Sitter–Painlevé coordinates. This observes accelerate wave packet along to a null geodesic, laying out severe exponential decay and moderate dispersion, increasing exponentially during propagation. The example we give is usual anisotropic Gaussian which present short graphical analysis pointing accelerated propagation, dispersion. Moreover, show that perceives horizon mirror stopping prepared on it reflecting those beyond it.