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 $\SU(2)$ by using entanglement. This problem has a similar structure with the phase estimation problem, which was discussed by Bužek, Derka, and Massar\cite{BDM}. The estimation error asymptotically decreases to zero with an order of $\frac{1}{n^2}$ at least.

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Cited by in corpus (2)

• Sequential feedback scheme outperforms the parallel scheme for Hamiltonian parameter estimation
• Ultimate precision of multi-parameter quantum magnetometry under the parallel scheme