Entanglement Engineering of Field State in Arbitrary Number of High-Q Cavities and its Dynamics in Dissipative Environment

Abstract

We develop a generalized scheme for engineering of GHZ-state and W-state using arbitrary number of high-Q cavities. We also study about entanglement degradation due to decoherence when the entangled states interact with the environment. GHZ-states and W-state are multipartite and maximally entangled states. They are very useful in quantum networking and quantum information processing. In our model, we use different setups of high-Q cavities for the entangled field generation of the respected state and we have generalized both models. Most important role in the model is of interaction parameters which give successful generation of entangled field state by controlling atom-field interaction using these precalculated interaction times. Further, the subject of dynamics of the initial entangled field states inside the high-Q cavities surrounded by thermal environment is investigated. It is concluded that the decoherence increases with the increase of cavities. Negativity is used as a measure of entanglement of high-Q cavities.