Mitigation (Zero-Noise Extrapolation)
Standard error-mitigation entry points, named the way the field already names them
(Richardson extrapolation, noise factors, zero-noise extrapolation), plus a density-matrix
extension (physical-cone projection, Uhlmann fidelity) and a jax.jit-compatible variant
of every entry point.
::: dense_evolution.mitigation
See also: dense_evolution.healing for the predictive-healing primitives
(calculate_delta_preemp) the healing-adapted extrapolation branch is built on, and
NoiseModel for the Kraus-channel noise used to build the noisy ensembles
these functions correct. Full worked example: Density-matrix ZNE healing.