  Based on the two-qubit Jaynes-Cummings model - a common cavity quantum
electrodynamics model, and extending to modification of the three-qubit
Tavis-Cummings model, we investigate the quantum correlation between light and
matter in bipartite quantum systems. By resolving the quantum master equation,
we are able to derive the dissipative dynamics in open systems. To gauge the
degree of quantum entanglement, some entanglement measurements are introduced:
von Neumann entropy, concurrence and quantum discord. In addition,
consideration is given to the impacts of initial entanglement and dissipation
strength on quantum discord. Finally we discussed two different cases of nuclei
motion: quantum and classical.
