Entanglement Transfer from Two-Mode Squeezed Vacuum State Field to Two Spatially Separated Atoms in Two-Photon Processes

We investigate the influence ofthe Stark shift on the entanglement transfer from the two-modesqueezed vacuum state field to two spatially separated atoms intwo-photon processes. Our results show that the Stark shift plays animportant role in such entanglement transfer. We find that when theStark shift parameter r is small, the degree of entanglement between the two atoms increases with the increasing of the squeezing parameter ξ first, and after achieving its maximal value, thedegree of entanglement will decrease to zero with the increasing ofξ; while for big r, E will increase with the increasing of ξ.