Stationary state entanglement and total correlation of two qubits or qutrits

Details Stationary state entanglement and total correlation of two qubits or qutrits Stationary state entanglement and total correlation of two qubits or qutrits

2005-04-29

arxiv.org/abs/quant-ph/0504228v1

MODERN PHYSICS LETTERS B 19, 1803 (2005)

Physics

Quantum Physics

5 pages, 2 figures, RevTex4

Scientific paper

10.1142/S0217984905009365

We investigate the mutual information and entanglement of stationary state of two locally driven qubits under the influence of collective dephasing. It is shown that both the mutual information and the entanglement of two qubits in the stationary state exhibit damped oscillation with the scaled action time $\gamma{T}$ of the local external driving field. It means that we can control both the entanglement and total correlation of the stationary state of two qubits by adjusting the action time of the driving field. We also consider the influence of collective dephasing on entanglement of two qutrits and obtain the sufficient condition that the stationary state is entangled.

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