We introduce a new protocol in continuous variable entanglement distillation that requires only linear temporal and constant physical or spatial resources.Compared with the existing protocols, our protocol uses atom-photon entanglement to substitute for atom-atom entanglement in existing protol, which will not only save the number of quantum memories, but also has the advantages in operation efficiency and temporal saving. The distillation can be realized by a fixed model of iterations, in which only three quantum memories and photon detectors are required.
@article{arxiv.1210.3794,
title = {A New Protocol of Continuous-Variable Entanglement Distillation},
author = {Shi Jin and Xian-Min Jin and Joshua Nunn and Animesh Datta and Ian Walmsley},
journal= {arXiv preprint arXiv:1210.3794},
year = {2012}
}