Information content of interacting fields in an expanding spacetime

Helder Alexander, Gustavo de Souza, I. G. da Paz, Marcos Sampaio

Published 2016-02-10Version 1

We study the interplay between particle creation, quantum mutual information and bipartite entanglement for two massive interacting scalar fields in a Robertson-Walker spacetime. By considering a solvable two-field model generating bipartite correlations, we show explicitly how the modewise free-field quantum entanglement experiences gravitational enhancement generated by the interaction. Moreover, we verify that this enhancement is increased for stronger coupling between the two fields.