Literature Review Key concepts
Key ideas for the COMP52060 solar/NF2 literature review.
Conceptual spine
- Coronal magnetic-field extrapolation as an inverse problem — infer a 3D coronal field from lower-boundary magnetograms.
- Potential field extrapolation — current-free baseline, useful but unable to model twist/shear/free energy.
- Force-free and NLFFF coronal fields — main physical model for active-region coronal fields.
- Photosphere versus corona force-free assumption — why the lower boundary is physically awkward.
- NF2 and physics-informed neural coronal extrapolation — neural/PINN representation of the same constrained inverse problem.
- NF2 diagnostics for physical credibility — how the method should be evaluated.
Papers / literature roles
- HMI/SHARP papers: justify the observational boundary data.
- Classical NLFFF papers: define the older physics-constrained optimisation baseline.
- PINN papers: justify embedding differential-equation residuals in the loss.
- NF2 paper/repo: specific method and reproduction target.
- AR11158 studies: justify the active region as a real scientific benchmark.
Good framing sentence
NF2 should be presented as a neural representation and optimisation strategy for a known NLFFF inverse problem, not as black-box AI replacing solar physics.