Entanglement dynamics of non-inertial observers in a correlated environment
arXiv:1301.2759 · doi:10.1007/s11128-011-0354-7
Abstract
Effect of decoherence and correlated noise on the entanglement of X-type state of the Dirac fields in the non-inertial frame is investigated. A two qubit X-state is considered to be shared between the partners where Alice is in inertial frame and Rob in an accelerated frame. The concurrence is used to quantify the entanglement of the X-state system influenced by time correlated amplitude damping, depolarizing and bit flip channels. It is seen that amplitude damping and bit flip channels heavily influence the entanglement of the system as compared to the depolarizing channel. It is found possible to avoid entanglement sudden death (ESD) for all the channels under consideration for μ>0.75 for any type of initial state. No ESD behaviour is seen for depolarizing channel in the presence of correlated noise for entire range of decoherence parameter p and Rob's acceleration r. It is also seen that the effect of environment is much stronger than that of acceleration of the accelerated partner. Furthermore, it is investigated that correlated noise compensates the loss of entanglement caused by the Unruh effect.
arXiv comment18 pages, 6 .eps figures, published online 14 January 2012 in Quantum Information Processing, Springer. arXiv admin note: substantial text overlap with arXiv:1204.1900; and text overlap with arXiv:1105.1216 by other authors
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