研究目的
Investigating the dynamics of atom-field entanglement for two natural or artificial two-level atoms interacting with a one-mode quantum electromagnetic field by means of multiphoton transitions in a lossless cavity.
研究成果
The dynamics of atom-field entanglement for a system consisting of two identical two-level atoms with multi-photon transitions interacting with an intense coherent one-mode cavity field were analyzed. It was found that for small multiplicities, the system can return to a pure separable state during evolution, while for large multiplicities, the system remains in an entangled state for all times except the initial instant. These findings have potential applications in the theory of quantum networks.
研究不足
The study is theoretical and does not account for dissipation or many modes of a cavity, which are present in more realistic models of quantum networks. The rotating wave approximation may not be suitable for strong or ultra-strong coupling regimes.
1：Experimental Design and Method Selection:
The study uses the Tavis-Cummings model to describe the interaction between two two-level atoms and a one-mode quantum electromagnetic field in a lossless cavity. The model is solved exactly under the rotating wave approximation.
2：Sample Selection and Data Sources:
The system consists of two identical two-level atoms interacting with a coherent one-mode cavity field. The initial states of the atomic subsystem and the field are specified.
3：List of Experimental Equipment and Materials:
The theoretical model involves quantum electromagnetic fields and two-level atoms, with no specific experimental equipment mentioned.
4：Experimental Procedures and Operational Workflow:
The dynamics of the system are analyzed through mathematical modeling, focusing on the entanglement between the atoms and the field for various initial states and multiplicities.
5：Data Analysis Methods:
The linear entropy of the reduced atomic density matrix is used to evaluate the degree of entanglement between the atoms and the field.
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