We investigate measurement-based entanglement purification protocols (EPP) in the presence of local noise and imperfections. We derive a universal, protocol-independent threshold for the required quality of the local resource states, where we show that local noise per particle of up to 24% is tolerable. This corresponds to an increase of the noise threshold by almost an order of magnitude, based on the joint measurement-based implementation of sequential rounds of few-particle EPP. We generalize our results to multipartite EPP, where we encounter similarly high error thresholds.
@article{arxiv.1303.2852,
title = {Universal and optimal error thresholds for measurement-based entanglement purification},
author = {M. Zwerger and H. J. Briegel and W. Dür},
journal= {arXiv preprint arXiv:1303.2852},
year = {2013}
}