An operational interpretation for multipartite entanglement

Abstract

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.

4 pages, 1 figure

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Cited by in corpus (5)

• Optimal estimation of entanglement
• Multipartite entanglement measure for all discrete systems
• Genuine multipartite entanglement of symmmetric Gaussian states: Strong monogamy, unitary localization, scaling behavior, and molecular sharing structure
• Dynamics of Global Entanglement under Decoherence
• Entanglement Measures for Intermediate Separability of Quantum States