After receiving the result of Bell-state measurement performed by Alice on atoms 1 ant 2, Bob lets atoms 2 and auxiliary atom A simultaneously interact with a single-mode vacuum cavity.

• 发送者Alice对原子1和2进行Bell基测量后并通过经典通道把测量结果告诉接收者Bob,Bob再把原子3和一个辅助原子A同时注入一个单模真空腔场。