{"artifact_id":"L1-150","layer":"L1","title":"Pump-Probe Spectroscopy / Imaging","domain":"Ultrafast Imaging","sub_domain":"Femtosecond two-pulse transient imaging","physics_fingerprint":{"L_DAG":3.5,"title":"Pump-Probe Spectroscopy / Imaging","domain":"Ultrafast Imaging","carrier":"photon","primitives":["L.pump_pulse","L.probe_pulse","L.delay_stage","int.temporal"],"sub_domain":"Femtosecond two-pulse transient imaging","noise_model":"gaussian","problem_class":"nonlinear_inverse","solution_space":"2D_transient_absorption","difficulty_delta":5,"integration_axis":"temporal","sensing_mechanism":"pump_probe_transient"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D transient absorption is guaranteed within the declared Omega bounds. Uniqueness is local rather than global (non-convex landscape); convergence depends on initialisation and priors. Stability is moderately conditioned (kappa_eff ~= 14); pulse_jitter dominates the stability cliff; delay_stage_drift and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"N_delays":256,"pulse_fs":50,"photon_count":1000,"pulse_jitter":0.0,"N_wavelengths":512,"thermal_drift":0.0,"delay_stage_drift":0.0,"two_color_overlap":1.0},"input_format":"measurement_only","problem_class":"pump_probe","forward_operator":"pump_probe_forward","epsilon_fn_center":"24.0"},"omega_bounds":{"N_delays":[32,2048],"pulse_fs":[10,500],"photon_count":[50,10000],"pulse_jitter":[0.0,50.0],"N_wavelengths":[64,4096],"thermal_drift":[0.0,0.3],"delay_stage_drift":[0.0,5.0],"two_color_overlap":[0.3,1.0]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["pump_probe"],"allowed_omega_dimensions":["N_delays","N_wavelengths","pulse_fs","photon_count","pulse_jitter","delay_stage_drift","two_color_overlap","thermal_drift","pulse_jitter","delay_stage_drift","two_color_overlap","thermal_drift"],"allowed_forward_operators":["pump_probe_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":5,"kappa":280,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x7c8274a2f2c863172af0fa6ffe8668fc1fc1760508c60443049892556c9a69bc","chain_tx_hash":"0x620ddcb4a1584ab2dfd0ac6d41a6a63658a309e58b556e997341418bf6ceb29c","chain_block":41554229}