Physics Structural Challenge Ledger
A ringed projection of the 102-item external physics problem feed plus 15 τ-native cross-cutting audit challenges. Wholesale import preserved; ring depth determines structural relevance.
Physics in the Structural Challenge Ledger
Physics is the only domain where the Structural Challenge Ledger preserves the full external open-problem import. This is deliberate. Physics is the most mature, mathematically formalised, measurement-facing description of reality, and a broad external stress surface is defensible.
The pinned source feed is Wikipedia’s List of unsolved problems in physics, captured at revision 1349830343 (April 19, 2026). 102 named entries are refactored into canonical SCL items, each gaining ring depth, subdomain cluster, physics-core weight, and prediction/falsification cross-links. A 15-page τ-native physics audit set sits alongside.
Wholesale import does not imply flat priority. Each entry is placed in a ring architecture that distinguishes foundational physics, sector closure, falsification seams, deep domain-structural questions, emergent collective systems, peripheral imported phenomena, and cross-domain handoffs.
Ring architecture
| Ring | Meaning |
|---|---|
| R0 | Ontic-foundational physics: theory of everything, dimensionless constants, quantum gravity, time, locality, measurement, gauge. |
| R1 | Sector architecture and unification: forces, hierarchy, generations, QCD vacuum, dark sector, Yang-Mills. |
| R2 | Quantitative and falsification seams: Hubble tension, dark matter, dark energy, neutrino masses, proton decay, supersymmetry, monopoles. |
| R3 | Deep domain-structural physics: nuclear, exotic hadrons, supernovae, black-hole growth, quantum information complexity, Navier-Stokes. |
| R4 | Emergent and collective systems: superconductivity, amorphous solids, topological order, turbulence, plasma, fractional Hall, superfluid helium. |
| R5 | Peripheral imported phenomena: ball lightning, flyby anomaly, Kuiper cliff, Saturn rotation, diffuse interstellar bands, sonoluminescence, ULXs. |
| R6 | Cross-domain handoff challenges: abiogenesis, homochirality, quantum biology, magnetoreception, protein folding, gene expression, immune system, quantum mind. |
Subdomain clusters
The 11 clusters group entries by where they sit scientifically: root foundations and physical semantics; quantum gravity, spacetime, time, and black holes; cosmology, early universe, and dark sector; particle physics, Standard Model, and BSM; QCD, nuclear physics, and dense matter; astrophysics, compact objects, and cosmic systems; fluid, plasma, turbulence, and collective dynamics; condensed matter, materials, and emergent phases; quantum information, computation, and cryptography; physics-life-mind boundary; peripheral imported phenomena.
Active construction
This domain ledger is in active construction. The ring architecture, subdomain clusters, and source policy above are canonical; detailed per-challenge items will appear on this page as the construction spine reaches each ring and cluster.
For the program-wide framework, see the Structural Challenge Ledger overview. For τ’s physics-side results, see the Physics results hub, the Predictions browser, and the Falsification pack.
What this ledger does not claim
- It does not claim τ has solved any imported physics problem.
- It does not imply external scientific consensus on any τ response.
- Out-of-scope items are visible but not rhetorically central.
Save or share this page for inspection
Download a portable dossier, copy a reviewer note, or send this page to someone who can inspect it.