Dependence of entanglement on initial states under amplitude damping channel

Details Dependence of entanglement on initial states under amplitude damping channel Dependence of entanglement on initial states under amplitude damping channel

2010-11-26

arxiv.org/abs/1011.5700v2

Physics

Quantum Physics

9 pages, 2 figures

Scientific paper

Under amplitude damping channel, we investigate the dependence of the entanglement on the initial states $|\Theta>_{1}$ and $|\Theta>_{2}$, which reduce to four orthogonal Bell states if we take the parameter of states $\alpha=\pm 1/\sqrt{2}$. We find that the entanglements for different initial states will decay along different curves even with the same acceleration and parameter of the states. We note that, in an inertial frame, the sudden death of the entanglement for $|\Theta>_{1}$ will occur if $\alpha>1/\sqrt{2}$, while it will not take place for $|\Theta>_{2}$ for any $\alpha$. We also show that the possible range of the sudden death of the entanglement for $|\Theta>_{1}$ is larger than that for $|\Theta>_{2}$.

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