Genuine Entanglement of Four Qubit Cluster Diagonal States

Details Genuine Entanglement of Four Qubit Cluster Diagonal States Genuine Entanglement of Four Qubit Cluster Diagonal States

2012-04-24

arxiv.org/abs/1204.5512v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

We reduce the necessary and sufficient biseparable conditions of the four qubit cluster diagonal state to concise forms. Using the relative entropy of entanglement as the entanglement measure, we analytically find the genuine entanglement of all the all the four qubit cluster diagonal states. The formulas of the genuine entanglement are of three kinds, for three different parameters regions. The overall maximal genuine entanglement of the states is one.

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