Quantum cloning optimal for joint measurements
Quantum Physics
2007-05-23 v1
Abstract
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.
Keywords
Cite
@article{arxiv.quant-ph/0009080,
title = {Quantum cloning optimal for joint measurements},
author = {G. M. D'Ariano and M. F. Sacchi},
journal= {arXiv preprint arXiv:quant-ph/0009080},
year = {2007}
}
Comments
4 pages. For "Quantum Communication, Measurement and Computing 3", O. Hirota and P. Tombesi, eds., Kluwer Acad./Plenum Publ., New York