Parallel Treatment of Estimation of SU(2) and Phase Estimation
Abstract
We discuss the accuracy of the estimation of the n identical unknown actions of (2) by using entanglement. This problem has a similar structure with the phase estimation problem, which was discussed by Buzek, Derka, and MassarBDM. The estimation error asymptotically decreases to zero with an order of 1n2 at least.
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