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arxiv: quant-ph/0701067 · v1 · submitted 2007-01-12 · 🪐 quant-ph

Entanglement witnesses and concurrence for multi-qubit states

classification 🪐 quant-ph
keywords concurrenceentanglementstateswitnessesmulti-qubitconstructconstructiondifferent
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We establish a relation between concurrence and entanglement witnesses. In particular, we construct entanglement witnesses for three-qubit W and GHZ states in terms of concurrence and different set of operators that generate it. We also generalize our construction for multi-qubit states.

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