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Entanglement and genuine entanglement of three qubit GHZ diagonal states

We analytically prove the necessary and sufficient criterion for the full separability of three-qubit Greenberger-Horne-Zeilinger (GHZ) diagonal states. The corresponding entanglement is exactly calculable for some GHZ diagonal states and is tractable for the others using the relative entropy of entanglement. We show that the biseparable criterion and the genuine entanglement are determined only by the biggest GHZ diagonal element regardless of all the other smaller diagonal elements. We have completely solved the entanglement problems of three-qubit GHZ diagonal states.

preprint2012arXivOpen access
Xiao-yu ChenLi-Zhen JiangPing YuMingzhen Tian
quant-ph
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Open access4 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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Xiao-yu ChenLi-Zhen JiangPing YuMingzhen Tian

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