%0 Journal Article
%T Quantum cloning optimal for joint measurements
%A G. M. D'Ariano
%A M. F. Sacchi
%J Physics
%D 2000
%I arXiv
%X We show that universally covariant cloning is not optimal for achieving joint measurements of noncommuting observables with minimum added noise. For such a purpose a cloning transformation that is covariant with respect to a restricted transformation group is needed.
%U http://arxiv.org/abs/quant-ph/0009080v1