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Abstract: We analyze the entanglement dynamics of a system composed by a pair ofneutral two-level atoms that are initially entangled, and the electromagneticfield, initially in the vacuum state, within the formalism of perturbativequantum field theory up to the second order. We show that entanglement suddendeath and revival can occur while the atoms remain spacelike-separated andtherefore cannot be related with photon exchange between the atoms. Weinterpret these phenomena as the consequence of a transfer of atom-atomentanglement to atom-field entanglement and viceversa. We also consider thedifferent bi-partitions of the system, finding similar relationships betweentheir entanglement evolutions.



Autor: Juan León, Carlos Sabín

Fuente: https://arxiv.org/







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