{"artifact_id":"L1-154","layer":"L1","title":"Quantum Illumination — entanglement-enhanced target detection","domain":"Quantum Imaging","sub_domain":"Two-mode squeezing for target detection below shot-noise","physics_fingerprint":{"L_DAG":4.5,"title":"Quantum Illumination — entanglement-enhanced target detection","domain":"Quantum Imaging","carrier":"photon","primitives":["L.entangled_photon_source","L.signal_probe_return","L.joint_detection","int.temporal"],"sub_domain":"Two-mode squeezing for target detection below shot-noise","noise_model":"shot_poisson","problem_class":"nonlinear_inverse","solution_space":"binary_detection_map","difficulty_delta":10,"integration_axis":"temporal","sensing_mechanism":"entanglement_detection"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered binary detection map 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 ~= 35); loss_and_noise_decoherence dominates the stability cliff; phase_drift and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) sets the irreducible data-fidelity floor, while TV / wavelet-sparsity / deep priors stabilise recovery at the ill-conditioned end of Omega.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":128,"W":128,"N_modes":1000000,"eta_idler":0.9,"eta_signal":0.1,"phase_drift":0.0,"mode_mismatch":0.0,"thermal_photons_per_mode":1,"loss_and_noise_decoherence":0.0},"input_format":"measurement_only","problem_class":"quantum_illumination","forward_operator":"quantum_illumination_forward","epsilon_fn_center":"16.0"},"omega_bounds":{"H":32,"W":32,"N_modes":[10000,1000000000],"eta_idler":[0.3,1.0],"eta_signal":[0.01,1.0],"phase_drift":[0.0,0.5],"mode_mismatch":[0.0,0.3],"thermal_photons_per_mode":[0.01,100],"loss_and_noise_decoherence":[0.0,0.5]},"epsilon_bounds":{"psnr_db":[5.0,40.0]},"allowed_problem_classes":["quantum_illumination"],"allowed_omega_dimensions":["H","W","N_modes","eta_signal","eta_idler","thermal_photons_per_mode","loss_and_noise_decoherence","phase_drift","mode_mismatch","loss_and_noise_decoherence","phase_drift","mode_mismatch","thermal_background"],"allowed_forward_operators":["quantum_illumination_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":10,"kappa":700,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x2e02a797d2bd1d9a544008258a6e6dd07e1ce8f075e64108972adec58d526e0d","chain_tx_hash":"0xb913d3a2ba6305f5be64a49383cc78e9fd4f2a00544c0ef1be4dc31294c8e863","chain_block":41554241}