Quantum cloning optimal for joint measurements

Details Quantum cloning optimal for joint measurements Quantum cloning optimal for joint measurements

2000-09-20

arxiv.org/abs/quant-ph/0009080v1

"Quantum Communication, Measurement and Computing 3", O. Hirota and P. Tombesi, eds., Kluwer Acad./Plenum Publ., New York 2001

Physics

Quantum Physics

4 pages. For "Quantum Communication, Measurement and Computing 3", O. Hirota and P. Tombesi, eds., Kluwer Acad./Plenum Publ.,

Scientific paper

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.

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