Continuous-variable entanglement distillation with noiseless linear amplification
Song Yi Yang, ShengLi Zhang, Xu‐Bo Zou, BI Si-wen, XuLing Lin · Physical Review A · 2012
Quantum entanglement distillation is a probabilistic process which protects entanglement from environment-induced decoherence. In this paper, we investigate the distillation of a continuousvariable optic entangled state with noiseless linear amplification (NLA). NLA schemes perform better than the conventional photon-subtraction-based distillation scheme, particularly in distributing entanglement over extremely low efficiency quantum channels. Finally, a comparison between the NLA-based scheme and the local squeezing-enhanced photon subtraction scheme is also investigated.