Three-atom system is investigated in this paper.Atoms 1 and 2 is entangled initial and is independent with atom 3.The single-mode field is in fock state.

• 摘要两个初始时纠缠的原子（原子1、2）之一（原子2）和另一分离原子（原子3）在单模腔中与粒子数场发生相互作用，研究了这一系统中原子纠缠的演化特性。