Derives the ultimate quantum limit for estimating functions of multiple parameters in general Hamiltonians, showing it reduces to an optimized single-parameter quantum Cramér-Rao bound with an attaining protocol.
Helstrom, IEEE Transactions on Information Theory 14, 234 (1968)
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Establishes an ultimate tradeoff relation constraining quantum estimation precision limits in multiparameter linear measurements, rooted in the Heisenberg uncertainty principle, with a condition for saturation and phase-based weight allocation.
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Multiparameter function estimation for general Hamiltonians
Derives the ultimate quantum limit for estimating functions of multiple parameters in general Hamiltonians, showing it reduces to an optimized single-parameter quantum Cramér-Rao bound with an attaining protocol.