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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A disorder marker derived from central moments of disorder distributions classifies quantum probes and exhibits quadratic dependence on weak identical disorder strength, enabling estimation of maximum tolerable disorder directly from the clean probe Hamiltonian and initial state.
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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.
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Robust quantum metrology using disordered probes
A disorder marker derived from central moments of disorder distributions classifies quantum probes and exhibits quadratic dependence on weak identical disorder strength, enabling estimation of maximum tolerable disorder directly from the clean probe Hamiltonian and initial state.