Entanglement combing

Details Entanglement combing Entanglement combing

2009-07-27

arxiv.org/abs/0907.4757v2

Phys. Rev. Lett. 103, 220501 (2009)

Physics

Quantum Physics

5 pages, 1 figure, replaced with final version

Scientific paper

We show that all multi-partite pure states can, under local operations, be transformed into bi-partite pairwise entangled states in a "lossless fashion": An arbitrary distinguished party will keep pairwise entanglement with all other parties after the asymptotic protocol - decorrelating all other parties from each other - in a way that the degree of entanglement of this party with respect to the rest will remain entirely unchanged. The set of possible entanglement distributions of bi-partite pairs is also classified. Finally, we point out several applications of this protocol as a useful primitive in quantum information theory.

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