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.
