We show that in the absence of the external driving field,excitonic entanglement and mixedness exhibit a periodic oscillation.

The entanglement character of two entangled atoms in multiphoton Tavis-Cummings model;

Mean photon number evolution of entangled atoms interacting with coherent state light-filed in T-C model;

Entropy properties in the system of two identical two-level entangled atoms interacting with coherent state;

The quantum entanglement of the two-photon Tavis-Cummings model;

New theory of quantum entanglement;

Quantum Entanglement and Decoherence;

The dynamical properties in the system of three identical two-level entangled atoms interacting with the Fock states field are investigated by mean of Schrodinger equation solution and numerical calculations.

In this article,the atomic dipole squeezing effects in the system of three identical two-level entangled atoms interacting with the coherent states field are investigated by mean of Schrdinger equation solution and numerical calculations.

The quantum properties of the light field in the system of thermal radiation field interacting with two identical entangled atoms are studied by means of time evolution operator and numerical calculations.

Being compared to traditional methods,like the spontaneously parametric down-conversion in a nonlinear crystal,the photonic crystal fibers can be used to generate entangled photons more efficiently.

The Formula of Entanglement Evaluation for Two-Electron Systems;

By using the concept of negativity, we investigate entanglement of (1/2,1) mixed-spin anisotropic XY model and obtain the numerical results of entanglement of two spins in a transverse field at finite temperature.

In addition to being of fundamental interest in quantum mechanics, entanglement as quantum correlations among quantum systems is a key element in rapid developing quantum informatics.