Collective Uncertainty Entanglement Test

Details Collective Uncertainty Entanglement Test Collective Uncertainty Entanglement Test

2011-06-10

arxiv.org/abs/1106.2018v1

Phys. Rev. Lett. 107, 150502 (2011)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

For a given pure state of a composite quantum system we analyze the product of its projections onto a set of locally orthogonal separable pure states. We derive a bound for this product analogous to the entropic uncertainty relations. For bipartite systems the bound is saturated for maximally entangled states and it allows us to construct a family of entanglement measures, we shall call collectibility. As these quantities are experimentally accessible, the approach advocated contributes to the task of experimental quantification of quantum entanglement, while for a three-qubit system it is capable to identify the genuine three-party entanglement.

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