An operational interpretation for multipartite entanglement

Details An operational interpretation for multipartite entanglement An operational interpretation for multipartite entanglement

2007-06-14

arxiv.org/abs/0706.2019v2

Phys. Rev. Lett. 100, 100503 (2008)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.100.100503

We introduce an operational interpretation for pure-state global multipartite entanglement based on quantum estimation. We show that the estimation of the strength of low-noise locally depolarizing channels, as quantified by the regularized quantum Fisher information, is directly related to the Meyer-Wallach multipartite entanglement measure. Using channels that depolarize across different partitions, we obtain related multipartite entanglement measures. We show that this measure is the sum of expectation values of local observables on two copies of the state.

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