Quantum cloning optimal for joint measurements
classification
🪐 quant-ph
keywords
cloningcovariantjointmeasurementsoptimaltransformationachievingadded
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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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