Purification of genuine multipartite entanglement

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Authors

HUBER Marcus PLESCH Martin

Year of publication 2011
Type Article in Periodical
Magazine / Source Physical Review A
MU Faculty or unit

Faculty of Informatics

Citation
Web http://pra.aps.org/abstract/PRA/v83/i6/e062321
Doi http://dx.doi.org/10.1103/PhysRevA.83.062321
Field Theoretical physics
Keywords quantum destillation
Description In tasks where multipartite entanglement plays a central role, state purification is, due to inevitable noise, a crucial part of the procedure. We consider a scenario exploiting the multipartite entanglement in a straightforward multipartite purification algorithm and compare it to bipartite purification procedures combined with state teleportation. While complete purification requires an infinite amount of input states in both cases, we show that for an imperfect output fidelity the multipartite procedure exhibits a major advantage in terms of input states used.
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