Cavity QED Schemes for Controlled Creation of Entanglement Between Distant Atoms

摘要

We analyse the commonly used adiabatic techniques in the atom-cavity field interaction to controllably entangle two distant atoms trapped inside a single-mode optical cavity. Two techniques are considered: the first involves a highly detuned cavity from the atomic transition frequencies, and the second involves a near resonant but strongly damped cavity. We show that both, the detuning and the cavity damping are needed to obtain the master equation of the collectively interacting atoms. We analyse the feasibility of the adiabatic techniques in creation of a long living entanglement and find that the cavity damping is more robust for generation of a stationary entanglement between the atoms. The dependence of the stationary entanglement on number of excitations in the system and strengths of the couplings of the atoms to the cavity mode is also discussed.