STUDY OF ENTANGLEMENT IN A MOVING FIVE-LEVEL ATOM

Abstract

In this dissertation we study the dynamics of entanglement for a cascade type five level atom interacting with cavity field. We investigate time evolution of the von Neumann entropy and the atomic populations numerically on the degree of entanglement for the pure resonant case whether the atom is at rest or in a motion. We show that the influence of atomic motion plays an important role in the creation and destruction of entanglement and it is correlated with the atomic populations. We also determine the effect of decoherence on the system. Moreover we discuss these phenomena in terms of entanglement and disentanglement.