Optimal cloning for finite distributions of coherent states

Abstract

The standard cloning limits for finite width Gaussian distributions of coherent states were described. The Gaussian quantum cloner maximized cloning fidelity for Gaussian distributions at particular level below unity gain. The measured maximum fidelity was observed to increase monotonically as function of distribution width. The relationship between optimal gain and state estimation was also described. The no-cloning limit for teleportation of coherent states changed in nontrivial way. Show more