Preprint
Sep 2026
Error-corrected function estimation advantage in multiparameter Hamiltonians
We establish the ultimate precision limits for estimating a function of multiple Hamiltonian parameters in the presence of Markovian noise. By reducing multiparameter function estimation to an optimization over effective single-parameter embeddings, we derive tight bounds on the quantum Fisher information. We identify...
E. Abbasgholinejad, Lorcán O. Conlon, S. R. Muleady et al.
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