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arxiv: quant-ph/0407053 · v3 · submitted 2004-07-07 · 🪐 quant-ph

Parallel Treatment of Estimation of SU(2) and Phase Estimation

classification 🪐 quant-ph
keywords estimationphaseproblemaccuracyactionsasymptoticallycitedecreases
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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 Bu\v{z}ek, 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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