Entanglement sensitivity to signal attenuation and amplification
Sergey N. Filippov, Mário Ziman · Physical Review A · 2014
Analysis of the noises that accompany attenuation and amplification and impose fundamental limitations on the performance of entanglement-assisted devices shows that Gaussian states of high energy are robust to very asymmetric attenuations, whereas non-Gaussian states are at an advantage in the case of symmetric attenuation and general amplification.