%0 Journal Article %1 citeulike:486654 %A Keyl, M. %A Werner, R. F. %D 1999 %J Journal of Mathematical Physics %K cloning %P 3283--3299 %T Optimal cloning of pure states, testing single clones %U http://arxiv.org/abs/quant-ph/9807010 %V 40 %X We consider quantum devices for turning a finite number N of d-level quantum systems in the same unknown pure state into M>N systems of the same kind, in an approximation of the M-fold tensor product of the state \sigma. In a previous paper it was shown that this problem has a unique optimal solution, when the quality of the output is judged by arbitrary measurements, involving also the correlations between the clones. We show in this paper, that if the quality judgement is based solely on measurements of single output clones, there is again a unique optimal cloning device, which coincides with the one found previously.

@article{citeulike:486654, abstract = {We consider quantum devices for turning a finite number N of d-level quantum systems in the same unknown pure state \sigma into M\>N systems of the same kind, in an approximation of the M-fold tensor product of the state \sigma. In a previous paper it was shown that this problem has a unique optimal solution, when the quality of the output is judged by arbitrary measurements, involving also the correlations between the clones. We show in this paper, that if the quality judgement is based solely on measurements of single output clones, there is again a unique optimal cloning device, which coincides with the one found previously.}, added-at = {2007-08-18T13:22:24.000+0200}, author = {Keyl, M. and Werner, R. F.}, biburl = {https://www.bibsonomy.org/bibtex/209742351ee550dfd907e9b7bb735ff77/a_olympia}, citeulike-article-id = {486654}, description = {citeulike}, eprint = {quant-ph/9807010}, interhash = {c7e05974bd6f0e6bfafe0548be060271}, intrahash = {09742351ee550dfd907e9b7bb735ff77}, journal = {Journal of Mathematical Physics}, keywords = {cloning}, month = {July}, pages = {3283--3299}, priority = {2}, timestamp = {2007-08-18T13:22:27.000+0200}, title = {Optimal cloning of pure states, testing single clones}, url = {http://arxiv.org/abs/quant-ph/9807010}, volume = 40, year = 1999 }