Application Of JC Model In Cavity Quantum Electrodynamics

Quantum information theory provides a new method of information transmission and processing. It brings the vitality and the vigor to traditional information science. Since quantum information theory can accomplish much work which the classic information science can not complete, the theory received more and more attention. Quantum entanglement plays an indispensable role in quantum information. It is the main research object in quantum information. The quantum entanglement in the quantum information has a wide range of applications including:recessive transmission, quantum key distribution and so on.Because the quantum system will be inevitably influenced by the external environment, decoherence in quantum information processing is the main problem. How to prepare and maintain the entanglement is the biggest challenges we face. Cavity quantum electrodynamics dynamics system is considered to be one of the most promising systems. It can be used to prepare and maintain entanglement. This thesis studies the cavity quantum electrodynamics model in the quantum theory. We study the system’s evolution using adiabatic approximation. By the adiabatic approximation, we take account of the interaction between the two atoms. We study two atoms interacting with light field and show how the entanglement is affected by the interaction between the two atoms. The result shows that we can maintain the entanglement by choosing the appropriate interaction parameter.