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Entanglement criteria for Dicke states

Dicke states are a family of multi-qubit quantum states with interesting entanglement properties and have been observed in many experiments. We construct entanglement witnesses for detecting genuine multiparticle entanglement in the vicinity of these states. We use the approach of PPT mixtures to derive the conditions analytically. For nearly all cases, our criteria are stronger than all conditions previously known.

preprint2013arXivOpen access
Marcel BergmannOtfried Gühne
quant-ph
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Open access2 authors1 topic
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Marcel BergmannOtfried Gühne

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