Quantum entanglement in the system of two two-level atoms interacting with a single-mode vacuum field

摘要

The entanglement properties of the system of two two-level atoms interacting with a single-mode vacuum field are explored. The quantum entanglement between two two-level atoms and a single-mode vacuum field is investigated by using the quantum reduced entropy; the quantum entanglement between two two-level atoms, and that between a single two-level atom and a single-mode vacuum field are studied in terms of the quantum relative entropy. The influences of the atomic dipole—dipole interaction on the quantum entanglement of the system are also discussed. Our results show that three entangled states of two atoms—field, atom—atom, and atom—field can be prepared via two two-level atoms interacting with a single-mode vacuum field.