The exact lensing spectrum score is a posterior-averaged quadratic estimator on delensed maps with realization-dependent debiasing, plus a small 2-point term degenerate with CMB spectra.
(2.2), where ⟨sCL ⟩ = 0 in for consistent fidu- cial model))
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On likelihood-based analysis of the gravitationally (de)lensed CMB
The exact lensing spectrum score is a posterior-averaged quadratic estimator on delensed maps with realization-dependent debiasing, plus a small 2-point term degenerate with CMB spectra.