Multipartite Entanglement and Frustration

Details Multipartite Entanglement and Frustration Multipartite Entanglement and Frustration

2009-10-16

arxiv.org/abs/0910.3134v1

New Journal of Physics 12, 025015 (2010)

Physics

Quantum Physics

15 pages, 7 figures

Scientific paper

10.1088/1367-2630/12/2/025015

Some features of the global entanglement of a composed quantum system can be quantified in terms of the purity of a balanced bipartition, made up of half of its subsystems. For the given bipartition, purity can always be minimized by taking a suitable (pure) state. When many bipartitions are considered, the requirement that purity be minimal for all bipartitions can engender conflicts and frustration arises. This unearths an interesting link between frustration and multipartite entanglement, defined as the average purity over all (balanced) bipartitions.

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