| Cloning and
superluminal signalingSIBASISH GHOSH
Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B.T. Road, Calcutta 700 035, India Email: res9603@isical.ac.in Abstract. It is shown that the no-signaling constraint generates the symmetric as well as the asymmetric 1 --> 2 optimal universal quantum cloning machine of single qubits.Keywords: Cloning; cloning fidelity; superluminal signaling; state discrimination. Pacs No. 03.65.Bz |