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arXiv:quant-ph/0407001 · Physics Letters A

Comparability of multipartite entanglement

Zhengfeng Ji, Runyao Duan, Mingsheng Ying

Published Aug 31, 2004• 6 citations
arXivHTMLPDF
DOI
10.1016/j.physleta.2004.08.015

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We investigate the behaviour of multipartite entanglement in finite-size quantum spin systems, resorting to a hierarchy of geometric measures of multipartite entanglement recently introduced in the literature. In particular, we investigate the ground-state entanglement in the XY model defined on finite chains of N sites with periodic boundary conditions. We analyse the behaviour of the geometric measures of (N 1)-partite and (N/2)-partite entanglement and compare them with the Wei‐Goldbart geometric measure of global entanglement.