On Quantum Discord for Analyzing Decoherence Effect and Deformation Phenomena in Entangled Coherent Bipartite State

We investigate the dynamics of the entanglement mainly the quantum correlation which evolves under the effects of decoherence in the framework 2×2 dimensional Hilbert space. A general formula for discord is determined as function of the deformation parameter, coherent amplitude and normalized decoherence time. It turns that, when the deformation tends toward the normal state, the classical discord formula is recovered under the same conditions. Considering different contexts and study cases, we find an approximation solution for the master equation regardless the deformation phenomena. Therefore, it may be helpful for choosing the most appropriate characteristics in order of realizing practical quantum information devices under realistic conditions.