Optimal cloning for finite distributions of coherent states

P. T. Cochrane, T. C. Ralph, A. Dolinska

Published 2003-11-18Version 1

We derive optimal cloning limits for finite Gaussian distributions of coherent states, and describe techniques for achieving them. We discuss the relation of these limits to state estimation and the no-cloning limit in teleportation. A qualitatively different cloning limit is derived for a single-quadrature Gaussian quantum cloner.