الفهرس 
chapter 1Only 14 pages are availabe for public view
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Abstract
In this thesis, we present and discuss some new features of the model of two two level atoms interacting with two single mode thermal cavity field via multi photon transitions under intensitydependent coupling. We examine the dynamics of quantum and classical correlations of the system that initially exists in Werner states. The results show that the sudden death and sudden birth of quantum entanglement occur; however, the geometric measure of quantum discord remains non zero. It is observed that when the number of photons increases, the periods become shorter as well as the quantum discord and the entanglement become irregular. On the other hand, we consider a model of two two level atoms interacting with a cavity field. An analytic solution is obtained and used to study the information entropy of the system. It is clear that the nonlinear term plays more prominent role on the entropic uncertainty compared with its effect on the concurrence. Our extensive study of information entropy of atoms field interaction demonstrates that using the coupling strength between the atoms and the field, as a controller parameter, one can control dynamics of the system through increasing the lower bound of the entropic uncertainty.