Quantum Entanglement In The System Of Two Two-level Atoms Interacting With A Single Mode Vacuum Field

In the quantum optics, the study of the quantum properties of the system of the atom interacting with the field has always attracted considerable attention. In this thesis, the degrees of the quantum entanglement in the system of two two-level atoms interacting with a single mode vacuum field are explored, and a series of significant results are obtained.Chapter 1 is a simple review of the history in research about the interaction between atom and field. Based on the Hamiltonian of the interaction system, which includes the interaction between two two-level atoms and a single mode vacuum field, the state vector and the density matrix of the system, and the reduced-density matrices of the subsystems are obtained by solving its Schrodinger equation, and the basic model of this problem is established.Chapter 2 is an introductory chapter which outlines the historical development of quantum entropy and quantum entanglement, and the relationship between the quantum entropy and quantum entanglement is explained. The basic theories about them are elaborated.Chapter 3 studies the quantum entanglement in the system of two two-level atoms interacting with a single mode vacuum field. The degree of the entanglement between two two-level atoms and the single mode...