Detecting a set of entanglement measures in an unknown tripartite quantum state by local operations and classical communication

Details Detecting a set of entanglement measures in an unknown tripartite quantum state by local operations and classical communication Detecting a set of entanglement measures in an unknown tripartite quantum state by local operations and classical communication

2006-04-28

arxiv.org/abs/quant-ph/0604209v1

Phys. Rev A 74, 022305 (2006)

Physics

Quantum Physics

16 pages, 2 figures, revtex

Scientific paper

10.1103/PhysRevA.74.022305

We propose a more general method for detecting a set of entanglement measures, i.e. negativities, in an \emph{arbitrary} tripartite quantum state by local operations and classical communication. To accomplish the detection task using this method, three observers, Alice, Bob and Charlie, do not need to perform the partial transposition maps by the structural physical approximation; instead, they are only required to collectively measure some functions via three local networks supplemented by a classical communication. With these functions, they are able to determine the set of negativities related to the tripartite quantum state.

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