Quantum Decoherence Problem in Quantum Teleportation Process in Two Three-level System

We present a scheme that Quantum decoherence problem in quantum teleportation process in two three-level system. Evolution of entanglement of two V-type three-level atom system with time were studied under the vacuum radiation field. When the distance between two atoms is far, that is, the two atoms are independent of each other, at this time, under the action of the vacuum radiation field, the atomic entanglement will suddenly die after a period of time; When the distance between two atoms is very small, the co-operative effect induced by the vacuum radiation field between atoms may appear entangled and suddenly recover after death. We then design the related parameter of entanglement death and entanglement, in order to find out the cause of the entanglement death in order to address them, thereby improving the quality of quantum communication.