pith. sign in

Then the right-hand side of (C33) becomes 1 2 α2 sinθ+ (|p|+|q|) cosθ ,(C34) whose maximum overθequals 1 2 p α2 2 + (|p|+|q|) 2

Then (C30) implies|u| ≤R and|v| ≤R, the maximum ofp u+q vis achieved atu=Rsgn(p),v=Rsgn(q), yielding max u,v (p u+q v+α 2y2) =α 2y2 +R(|p|+|q|)

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Multiparameter function estimation for general Hamiltonians

quant-ph · 2026-05-05 · unverdicted · novelty 8.0

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.

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  • Multiparameter function estimation for general Hamiltonians quant-ph · 2026-05-05 · unverdicted · none · ref 63

    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.