Continuous variable entanglement sharing in non-inertial frames

We study the distribution of entanglement between modes of a free scalar field from the perspective of observers in relative acceleration. The degradation of entanglement due to the Unruh effect is analytically studied for two parties detecting a two-mode squeezed state in an inertial frame, in the cases of either one or both observers undergoing uniform acceleration. We find that for two non-inertial observers moving with finite acceleration, the entanglement vanishes between the lowest frequency modes. The loss of entanglement is precisely explained as a redistribution of the inertial entanglement into multipartite quantum correlations among accessible and unaccessible modes from a non-inertial perspective. We show that classical correlations are also lost for two accelerated observers but conserved if one of the observers remains inertial.