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We compute the entanglement entropy variation between initial (separable orentangled in the momenta) and final states $\Delta S_E$ in an elasticscattering of a bipartite system composed by two interacting scalar particles.We perform a quantum field theoretical calculation to one loop order and verifythat $\Delta S_E $ changes as we vary the energy of incoming particles and thecoupling strength in a non-trivial way.

Momentum correlations of scattered particles in quantum field theory: one-loop entanglement generation