Quantum information has been focus of science research since the1980s. Because the characteristics of coherence, entanglement and additivity in quantum mechanics, information can be stored, transferred, and computed by means of quantization to achieve the goal of quantum key distribution, quantum communication, quantum computing. There are many physical carriers to realize quantum information processing (QIP). Among these, cavity QED system can realize QIP by the interaction of atom and photon. The system h...