Derivation and structural analysis of ratio maps in dynamical-decoupling noise spectroscopy, indicating new protocol designs.
Derivation and structural analysis of the ratio map R(α)=21+2−αR(α)={2}{1+2-α}R(α)=1+2−α2 arising in dynamical-decoupling noise spectroscopy.The work develops its combinatorial origin, Parseval weight structure, logistic and operator-mean representations, Fisher/fragility geometry, and multi-ratio protocol design framework.
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Hiroyuki Shioiri (2026) studied this question.
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