Introduces a covariance-dependent geometry in dynamical-decoupling spectroscopy, showing effects of noise on observability.
Introduces a covariance-dependent observability geometry for dynamical-decoupling spectroscopy using the noise-whitened Fisher metric F=JTΣ−1JF = J^TΣ⁻¹JF=JTΣ−1J. The work shows that correlated observational noise induces smooth but localized geometric reorganization, including substantial soft-mode rotation and anisotropy redistribution in reduced inverse-map geometry.
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Hiroyuki Shioiri (2026) studied this question.
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