Multipartite entanglement in four-qubit graph states
Physics Department, Shahid Chamran
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Received in final form: 11 January 2016
Published online: 22 March 2016
We consider a compendium of the non-trivial four-qubit graphs, derive their corresponding quantum states and classify them into equivalent classes. We use Meyer-Wallach measure and its generalizations to study block-partition and global entanglement in these states. We obtain several entanglement quantities for each graph state, which present a comprehensive characterization of the entanglement properties of the latter. As a result, a number of correlations between the graph structure and multipartite entanglement quantities have also been established.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2016