The Evolution Characteristics Of The Two Atom Entanglement In The Jaynes-cummings Model

We have investigated the entanglement evolution of the two atoms in the interaction system of the two two-level atoms and the two-mode Fock-state cavity.The result shows that when the two atoms are in the different states, the couplingstrength of the atoms and cavity field and the strength of the dipole interaction arethe same, the entanglement between the two atoms increase with the increasing ofthe particle number is zero, the two atoms can not reach the maximal entanglement.Moreover, their oscillation period keep invariable. When the two atoms are in dif-ferent states, the entanglement between the atoms increase with the increasing ofthe dipole interaction, and their oscillation period get shorter. When the two atomsare in the ground state, and the particle number of the cavity is zero, the two atomsdon't entangle. However, when the particle number isn't zero, the two atoms can'treach maximal entanglement under the influence of the dipole interaction. More-over, the entanglement of the two atoms decrease with the increasing of the dipolointeraction and the particle number of the cavity field. When the two atoms are inthe exited state, the two atoms don't entangle.