{"artifact_id":"L2-914","layer":"L2","parent_l1":"L1-914","title":"Radiation-Entropy / Island Twin","omega":{"dims":{"model":"JT-gravity|2d-CFT|toy-qubit","coupling":[0.0,1.0],"temperature":[0.1,2.0]},"type":"range"},"epsilon":{"type":"fn","expression":"≤ 5% deviation from the unitary Page curve; entropy bounded by min(S_BH, S_rad)"},"difficulty_score":0.9,"delta_tier":50,"fingerprint":"96703b990586dbeef79a4e39e5d6e7e18f7e665a98212ece0e7da54b3c2e02f3","status":"testnet","submitted_by":"grand_challenge_genesis","chain_hash":null,"chain_tx_hash":null,"chain_block":null,"plain_intro":"Radiation-Entropy / Island Twin is a digital twin specification derived from principle L1-914. It defines the forward operator and a 3-dimensional parameter space Ω over which benchmarks are seeded. Each benchmark drawn from this twin is a concrete measurement instance with fixed Ω values; solvers must invert that specific measurement."}