Separability criteria and entanglement witnesses for symmetric quantum states

Details Separability criteria and entanglement witnesses for symmetric quantum states Separability criteria and entanglement witnesses for symmetric quantum states

2009-08-26

arxiv.org/abs/0908.3679v3

Appl. Phys. B 98, 617 (2010)

Physics

Quantum Physics

5 pages, no figures, LaTeX; v2: typos corrected, introduction extended; v3: small corrections, published version; for the proc

Scientific paper

10.1007/s00340-009-3839-7

We study the separability of symmetric bipartite quantum states and show that
a single correlation measurement is sufficient to detect the entanglement of
any bipartite symmetric state with a non-positive partial transpose. We also
discuss entanglement conditions and entanglement witnesses for states with a
positive partial transpose.

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