  We study the evolution of the two scalar fields entangled via a mutual
interaction in an expanding spacetime. We compute the logarithmic negativity to
leading order in perturbation theory and show that for lowest order in the
coupling constants, the mutual interaction will give rise to the survival of
the quantum correlations in the limit of the smooth expansion. The results
suggest that interacting fields can codify more information about the
underlying expansion spacetime and lead to interesting observable effects.
