Decoherence of Entanglement in Markov Approximation in Terms of Rotating Wave Approximation

Abstract

In this paper, we extend our theoretical work on the pure state entanglement of bipartite or two-mode physical and chemical systems interacting with general static entangling interactions and external electromagnetic fields to include the mixed state entanglement. It is assumed that the Markov approximation is valid in our model system. Based on the partitioning of the entangling interaction matrix, we investigate the effect of the entangling interaction matrix elements and the relaxation constants on the decoherence of the Bell states. Our calculations indicate that only a few elements of the entangling interaction matrix and relaxation constants are dominant for the decoherence dynamics of the Bell states.