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- W87741566 abstract "We identify optimal measurement strategies for phase estimation in different scenarios. For pure states of a single qubit, we show that optimal measurements form a broad set parametrized with a continuous variable. When the state is mixed this set reduces to merely two possible measurements. For two qubits, we focus on the symmetric Werner state. We find an optimal measurement and show that estimation from the population imbalance is optimal only if the state is pure. Finally, for a pure state of $N$ qubits, we finds under which conditions the estimation from the full $N$-body correlation and from the population imbalance are optimal." @default.
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- W87741566 date "2016-02-04" @default.
- W87741566 modified "2023-10-18" @default.
- W87741566 title "Optimal measurements in phase estimation: simple examples" @default.
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- W87741566 doi "https://doi.org/10.1007/s11128-016-1248-5" @default.
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