The entanglement of two dipole–dipole coupled atoms interacting with a thermal field via a two-photon process

Abstract

This paper studies entanglement between two dipole–dipole coupled atoms interacting with a thermal field via a two-photon process. It shows that the entanglement is dependent on the mean photon number of the thermal field and the dipole–dipole interaction. The results also show that the atom–atom entanglement through the two-photon process is larger than that through the one-photon process and a remarkable amount of entanglement between the atoms still remains at certain times even for a very highly noisy thermal field.