{
  "schema": "semiagora.superconducting-photon-detector-current-crowding-evidence-map.v1",
  "version": "2026-08-26-v102",
  "experiment_id": "SA-SENS-SNSPD-001",
  "title": "Superconducting photon detector current-crowding and evidence map",
  "summary": "A deterministic browser packet connecting declared geometry, local current distribution, edge/constriction state, illuminated or dark context, detection-regime ambiguity, metrology lineage, uncertainty, contradictions, and the next owned evidence check.",
  "execution_mode": "precomputed_browser_csv_replay_only",
  "counts": {
    "rows": 5184,
    "geometry_states": 4,
    "current_states": 4,
    "distribution_states": 3,
    "constriction_states": 3,
    "event_contexts": 2,
    "detection_regimes": 3,
    "metrology_lineages": 3,
    "uncertainty_states": 2,
    "taxonomy_nodes_covered": 6,
    "source_anchors": 11,
    "external_numeric_values": 0,
    "real_measurement_rows": 0,
    "copied_publication_results": 0,
    "copied_device_dimensions": 0,
    "fabrication_recipe_steps": 0,
    "cryostat_or_instrument_control_actions": 0,
    "actual_bias_current_recommendations": 0,
    "calibrated_detector_predictions": 0,
    "device_or_product_rankings": 0,
    "detector_qualification_actions": 0,
    "yield_or_reliability_forecasts": 0,
    "liveServerRuns": 0
  },
  "axes": {
    "geometry_states": [
      {
        "id": "straight_strip_reference",
        "label": "Straight-strip mathematical reference",
        "crowdingFactor": 1,
        "opticalReach": 0.62,
        "evidenceScore": 55,
        "note": "Original uniform-path reference; no physical strip width, thickness, material, or field map is implied."
      },
      {
        "id": "rounded_return_path_proxy",
        "label": "Rounded-return-path proxy",
        "crowdingFactor": 1.06,
        "opticalReach": 0.7,
        "evidenceScore": 60,
        "note": "Original rounded-turn sensitivity state; it is not a layout or detector-design recommendation."
      },
      {
        "id": "sharp_inner_turn_proxy",
        "label": "Sharp-inner-turn proxy",
        "crowdingFactor": 1.3,
        "opticalReach": 0.68,
        "evidenceScore": 35,
        "note": "Original high-crowding hypothesis used to expose geometry dependence without copying a source geometry."
      },
      {
        "id": "edge_balanced_wide_strip_hypothesis",
        "label": "Edge-balanced wide-strip hypothesis",
        "crowdingFactor": 0.9,
        "opticalReach": 0.82,
        "evidenceScore": 45,
        "note": "Original redistribution hypothesis inspired only at the vocabulary level by current research; no rail dimension, current, field, or result is reused."
      }
    ],
    "current_states": [
      {
        "id": "low_normalized_loading",
        "label": "Low normalized loading",
        "fraction": 0.38
      },
      {
        "id": "moderate_normalized_loading",
        "label": "Moderate normalized loading",
        "fraction": 0.56
      },
      {
        "id": "high_normalized_loading",
        "label": "High normalized loading",
        "fraction": 0.72
      },
      {
        "id": "near_transition_loading_proxy",
        "label": "Near-transition loading proxy",
        "fraction": 0.86
      }
    ],
    "distribution_states": [
      {
        "id": "uniform_sheet_current_reference",
        "label": "Uniform sheet-current reference",
        "factor": 1,
        "evidenceScore": 50,
        "note": "A mathematical distribution reference, not a solved electromagnetic or superconducting-current map."
      },
      {
        "id": "edge_weighted_current_proxy",
        "label": "Edge-weighted current proxy",
        "factor": 1.16,
        "evidenceScore": 35,
        "note": "Original edge-loading multiplier with no copied field solution or calibrated material parameter."
      },
      {
        "id": "redistributed_edge_balance_proxy",
        "label": "Redistributed edge-balance proxy",
        "factor": 0.88,
        "evidenceScore": 45,
        "note": "Original current-redistribution sensitivity state; no balancing structure or operating condition is prescribed."
      }
    ],
    "constriction_states": [
      {
        "id": "no_constriction_declared",
        "label": "No constriction declared",
        "factor": 1,
        "darkPenalty": 0,
        "evidenceScore": 55,
        "note": "Absence from the teaching row is not evidence that a fabricated device is defect-free."
      },
      {
        "id": "unresolved_edge_or_constriction",
        "label": "Unresolved edge or constriction",
        "factor": 1.2,
        "darkPenalty": 0.24,
        "evidenceScore": 25,
        "note": "Original unresolved-defect pressure state; no defect size, location, image, or yield statistic is supplied."
      },
      {
        "id": "replacement_map_required",
        "label": "Owned replacement map required",
        "factor": 1.08,
        "darkPenalty": 0.12,
        "evidenceScore": 40,
        "note": "Names the evidence slot that must be replaced by an owned spatial map; this packet contains no such map."
      }
    ],
    "event_contexts": [
      {
        "id": "illuminated_candidate_event",
        "label": "Illuminated candidate-event context",
        "photonDrive": 1,
        "backgroundWeight": 0.18,
        "note": "The row permits a photon-response proxy while retaining a background contribution."
      },
      {
        "id": "dark_observation_context",
        "label": "Dark-observation context",
        "photonDrive": 0,
        "backgroundWeight": 1,
        "note": "Photon-trigger output is forced to zero so a dark event cannot be relabeled as a detected photon."
      }
    ],
    "detection_regimes": [
      {
        "id": "thermal_hotspot_proxy",
        "label": "Thermal-hotspot proxy",
        "photonCoupling": 0.78,
        "darkFactor": 0.35,
        "barrierExponent": 1.1,
        "timingFactor": 0.72,
        "note": "Original regime label and coefficients; no hotspot dimension, energy, temperature, or material model is solved."
      },
      {
        "id": "vortex_assisted_proxy",
        "label": "Vortex-assisted proxy",
        "photonCoupling": 0.56,
        "darkFactor": 0.78,
        "barrierExponent": 1.6,
        "timingFactor": 0.62,
        "note": "Original mechanism-sensitivity state; it is not a vortex-rate calculation or mechanism identification."
      },
      {
        "id": "mixed_transition_proxy",
        "label": "Mixed-transition proxy",
        "photonCoupling": 0.68,
        "darkFactor": 0.56,
        "barrierExponent": 1.35,
        "timingFactor": 0.68,
        "note": "Keeps mechanism ambiguity visible instead of assigning a measured event to one model."
      }
    ],
    "metrology_lineages": [
      {
        "id": "raw_count_window_only",
        "label": "Raw count-window only",
        "confidence": 32,
        "timingFactor": 0.25,
        "fluxTraceability": 0.1,
        "backgroundControl": 0.2,
        "note": "Count windows exist without a traceable photon-flux, background, timing, or coupling chain."
      },
      {
        "id": "calibrated_flux_and_background_proxy",
        "label": "Calibrated-flux and background proxy",
        "confidence": 68,
        "timingFactor": 0.45,
        "fluxTraceability": 0.85,
        "backgroundControl": 0.8,
        "note": "Represents a prepared calibration lineage; this packet contains no calibration result or uncertainty budget."
      },
      {
        "id": "time_correlated_traceable_chain_proxy",
        "label": "Time-correlated traceable-chain proxy",
        "confidence": 82,
        "timingFactor": 0.88,
        "fluxTraceability": 0.9,
        "backgroundControl": 0.85,
        "note": "Represents a prepared timing and radiometry lineage, not instrument control or detector characterization data."
      }
    ],
    "uncertainty_states": [
      {
        "id": "declared_nominal_proxy",
        "label": "Declared nominal proxy",
        "width": 0.08,
        "penalty": 8,
        "note": "A compact teaching envelope, not a measured standard uncertainty."
      },
      {
        "id": "expanded_boundary_proxy",
        "label": "Expanded boundary proxy",
        "width": 0.18,
        "penalty": 18,
        "note": "A wider original sensitivity envelope; no coverage factor or confidence level is claimed."
      }
    ]
  },
  "methods": [
    "Generate the complete 4 x 4 x 3 x 3 x 2 x 3 x 3 x 2 Cartesian sweep with no random sampling, fitting, optimization, hidden state, or external device value.",
    "Use original dimensionless current-loading, barrier, event, timing-lineage, attribution, and evidence-readiness equations; none is a calibrated superconducting detector model.",
    "Force photon-trigger output to zero in dark-observation rows, emit contradictions when geometry, redistribution, constriction, loading, metrology, or uncertainty declarations disagree, and route every row to an owned-evidence gate.",
    "Keep six topic-specific claim maps and eleven official or primary source anchors separate from the generated numbers."
  ],
  "limitations": [
    "No Maxwell, London, Ginzburg-Landau, time-dependent Ginzburg-Landau, vortex-rate, hotspot, electrothermal, optical-stack, circuit, cryogenic, or fabrication simulation is executed.",
    "The scores are dimensionless within-packet teaching proxies, not current density, critical current, energy barrier, detection efficiency, dark-count rate, timing jitter, count rate, or readiness in physical units.",
    "No material, film, geometry, wavelength, temperature, bias current, magnetic field, coupling stack, readout, device, vendor, or product is predicted, selected, ranked, or qualified."
  ],
  "public_boundary": [
    "Zero external numeric values, real measurement rows, copied publication results, copied device dimensions, process steps, equipment-control actions, operating-current recommendations, calibrated predictions, rankings, qualification actions, forecasts, or live server runs enter the dataset.",
    "No instrument control or cryostat-control instruction is provided.",
    "No fabrication recipe, detector operating recommendation, calibrated performance prediction, design recommendation, yield forecast, product comparison, qualification, or signoff action is provided.",
    "A real claim requires owned spatial current/defect evidence, detector and readout records, traceable radiometry and timing, background separation, uncertainty and drift evidence, mechanism review, and accountable detector/metrology owners."
  ],
  "source_observation": {
    "observation_date": "2026-08-26",
    "mode": "official and primary link review only",
    "exclusion": "No source-reported numeric result, geometry, process condition, equation, figure, table, or device conclusion is used as a model input."
  },
  "sources": [
    {
      "id": "src-nist-snspd-wide-strip-2026",
      "label": "NIST: wider superconducting photon detectors and edge-current redistribution",
      "organization": "NIST",
      "url": "https://www.nist.gov/news-events/news/2026/08/nist-researchers-supersize-quantum-technology-help-detect-faint-photons",
      "sourceClass": "government-research-summary",
      "rights": "Official link, public metadata, and original synthesis only; no article text, image, device dimension, current, field, performance value, or fabrication detail is copied.",
      "note": "Current-distribution, edge-defect, wide-strip, dark-event, and remaining-efficiency-evidence vocabulary anchor."
    },
    {
      "id": "src-optica-wide-snspd-599984",
      "label": "Optica: intrinsic-performance limits of wider SNSPDs",
      "organization": "Optica Publishing Group / research authors",
      "url": "https://doi.org/10.1364/OPTICA.599984",
      "sourceClass": "primary-journal-metadata",
      "rights": "Publisher DOI and metadata only; no publication body, figure, table, equation, device value, process condition, or conclusion is mirrored.",
      "note": "Primary publication anchor for current redistribution and evidence boundaries; all generated coefficients are independent SemiAgora assumptions."
    },
    {
      "id": "src-arxiv-wide-snspd-2601-15971",
      "label": "arXiv: wider SNSPD intrinsic-limit preprint record",
      "organization": "arXiv / research authors",
      "url": "https://arxiv.org/abs/2601.15971",
      "sourceClass": "primary-preprint-metadata",
      "rights": "Public metadata, abstract, version history, and link only; no PDF text, source, figure, table, equation, dimension, or result is copied.",
      "note": "Versioned preprint lineage for the current NIST/Optica work; it supplies no numeric input to the model."
    },
    {
      "id": "src-aps-current-crowding-174510",
      "label": "APS: geometry-dependent critical currents in superconducting nanocircuits",
      "organization": "American Physical Society / research authors",
      "url": "https://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.174510",
      "sourceClass": "primary-journal-abstract",
      "rights": "Publisher abstract and metadata link only; no article body, geometry, equation, field map, figure, table, or result is copied.",
      "note": "Geometry and current-crowding mechanism vocabulary anchor without importing a critical-current model."
    },
    {
      "id": "src-aip-current-crowding-4711217",
      "label": "AIP: experimental critical-current reduction from current crowding",
      "organization": "AIP Publishing / research authors",
      "url": "https://doi.org/10.1063/1.4711217",
      "sourceClass": "primary-journal-metadata",
      "rights": "DOI, title, and abstract-level scope only; no paper body, device geometry, process, measurement row, figure, table, or result is copied.",
      "note": "Experimental-evidence anchor showing why geometry and constriction claims require owned measurements."
    },
    {
      "id": "src-aps-vortex-assisted-014505",
      "label": "APS: vortex-assisted photon and dark-count mechanisms",
      "organization": "American Physical Society / research authors",
      "url": "https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.014505",
      "sourceClass": "primary-journal-abstract",
      "rights": "Publisher abstract and metadata link only; no derivation, equation, rate, field condition, figure, table, or result is copied.",
      "note": "Mechanism-separation anchor for photon, dark, and vortex-assisted contexts without selecting a mechanism for any real detector."
    },
    {
      "id": "src-nist-snspd-efficiency-calibration",
      "label": "NIST: photon-counting detection-efficiency calibration comparison",
      "organization": "NIST / national metrology institute authors",
      "url": "https://www.nist.gov/publications/verification-calibration-methods-determining-photon-counting-detection-efficiency-using",
      "sourceClass": "government-primary-publication-metadata",
      "rights": "Official metadata and abstract-level scope only; no calibration data, uncertainty value, setup, equation, table, or result is copied.",
      "note": "Photon-flux traceability, connector/coupling lineage, and calibration-comparison evidence anchor."
    },
    {
      "id": "src-nist-quantum-radiometry",
      "label": "NIST Quantum Radiometry",
      "organization": "NIST",
      "url": "https://www.nist.gov/programs-projects/quantum-radiometry",
      "sourceClass": "government-metrology-program",
      "rights": "Official program link and original synthesis only; no image, apparatus detail, calibration procedure, service result, or operating instruction is copied.",
      "note": "Single-photon source and detector measurement-chain and traceability anchor."
    },
    {
      "id": "src-nist-snspd-technology",
      "label": "NIST: superconductive nanowire single-photon detector technology",
      "organization": "NIST",
      "url": "https://www.nist.gov/noac/technology/quantum-optics-and-radiometry/superconductive-nanowire-single-photon-detectors",
      "sourceClass": "government-technology-overview",
      "rights": "Official link and original synthesis only; no image, device design, operating value, performance comparison, or application claim is copied into model rows.",
      "note": "Detector-event, optical coupling, readout, reset, dark-count, and characterization vocabulary anchor."
    },
    {
      "id": "src-nist-snspd-timing-spatial",
      "label": "NIST: spatial dependence of SNSPD output-pulse delay",
      "organization": "NIST / research authors",
      "url": "https://www.nist.gov/publications/spatial-dependence-output-pulse-delay-niobium-nitride-nanowire-superconducting-single",
      "sourceClass": "government-primary-publication-metadata",
      "rights": "Official metadata and abstract-level scope only; no device dimensions, measurement setup, timing value, map, figure, table, or result is copied.",
      "note": "Timing-lineage and spatial-nonuniformity evidence anchor without producing a jitter prediction."
    },
    {
      "id": "src-nist-tn1297",
      "label": "NIST Technical Note 1297: measurement uncertainty",
      "organization": "NIST",
      "url": "https://www.nist.gov/pml/nist-technical-note-1297",
      "sourceClass": "government-metrology-guidance",
      "rights": "Official guidance link and original synthesis only; no controlled text is mirrored.",
      "note": "Measurand, standard uncertainty, combined uncertainty, expanded uncertainty, and reporting-lineage anchor."
    }
  ]
}