Quantum Signal Characterisation

What This Does

The API accepts raw time-series data — voltage samples, IQ pairs, ADC readings — and returns a structural characterisation of what the signal is doing. It works on radio signals, sensor streams, financial data, or any continuous measurement.

Endpoints

All paths are relative to https://signal.sparse-supernova.com

Sparseical PC Compute Runtime artefacts are repo-side. They do not add live Worker execution routes in API v1.0.

POST /api/characterise
X-API-Key: demo-sparse-supernova-2026
Content-Type: application/json

{
  "samples": [
    0,
    0.0747,
    0.1478,
    0.2175,
    0.2823,
    0.3408,
    0.3917,
    0.4337,
    0.466,
    0.4879,
    0.4987,
    0.4984,
    0.4869,
    0.4645,
    0.4316,
    0.389,
    0.3377,
    0.2788,
    0.2137,
    0.1437,
    0.0706,
    -0.0042,
    -0.0789,
    -0.1518,
    -0.2213,
    -0.2858,
    -0.3439,
    -0.3943,
    -0.4358,
    -0.4675,
    -0.4888,
    -0.499,
    -0.4981,
    -0.486,
    -0.4629,
    -0.4295,
    -0.3864,
    -0.3346,
    -0.2753,
    -0.2099,
    -0.1397,
    -0.0664,
    0.0084,
    0.083,
    0.1558,
    0.225,
    0.2892,
    0.3469,
    0.3968,
    0.4378,
    0.469,
    0.4896,
    0.4993,
    0.4977,
    0.4849,
    0.4613,
    0.4273,
    0.3837,
    0.3315,
    0.2718,
    0.2061,
    0.1357,
    0.0622,
    -0.0126,
    -0.0872,
    -0.1598,
    -0.2288,
    -0.2926,
    -0.3499,
    -0.3994,
    -0.4398,
    -0.4704,
    -0.4905,
    -0.4995,
    -0.4973,
    -0.4839,
    -0.4597,
    -0.4251,
    -0.381,
    -0.3283,
    -0.2683,
    -0.2022,
    -0.1316,
    -0.0581,
    0.0168,
    0.0913,
    0.1637,
    0.2325,
    0.296,
    0.3529,
    0.4019,
    0.4418,
    0.4718,
    0.4913,
    0.4997,
    0.4968,
    0.4828,
    0.458,
    0.4229,
    0.3783,
    0.3251,
    0.2647,
    0.1984,
    0.1276,
    0.0539,
    -0.021,
    -0.0954,
    -0.1677,
    -0.2362,
    -0.2994,
    -0.3559,
    -0.4044,
    -0.4438,
    -0.4732,
    -0.492,
    -0.4998,
    -0.4963,
    -0.4817,
    -0.4563,
    -0.4206,
    -0.3755,
    -0.3219,
    -0.2612,
    -0.1945,
    -0.1235,
    -0.0497,
    0.0252,
    0.0996
  ],
  "config": {
    "sample_rate": 44100,
    "dim": 64,
    "stride": 16,
    "trajectory_count": 3
  }
}

Example Response

Response sample for documentation — not a request payload.

POST /api/v1/diagnose

Structural domains use /api/characterise internally plus static domain rules. Two domains bypass the embedding for their primary verdict: qubit_degradation uses weighted decay fitting, and qec_syndrome uses direct episode detection for persistent leakage islands.

Click Copy runnable JSON or Load NV diagnose example (500-point trace).

NV diamond — confirmed input contract

NV PASS is advisory. It is not diamond certification and not a replacement for DEER spectroscopy. Current validation basis is simulated QuTiP Lindblad traces, not real hardware FID.

Topological screening — 5-feature encoding (`topo_shim_v0`)

Raw conductance does not work. Each bias point must be encoded as 5 features (G, V, B, dG/dV, G_zbp) and flattened into trace[]. Minimum M = 26 bias points (trace ≥ 130). Recommended M = 100 (trace = 500). See topo_shim_v0.mjs and API_MASTER.md.

Qubit degradation — weighted decay-fit branch

The qubit_degradation route is not an embedding event-count branch. It fits paired baseline/current FID traces and detects statistically significant T₂/T₂* degradation. Qubit degradation is WORKING under the validated FID/Gaussian T₂* input contract.

Runnable request — 128 paired time points (API minimum for arrays). Copy or use Diagnose: Qubit Degradation in Try It.

POST /api/v1/diagnose
X-API-Key: demo-sparse-supernova-2026
Content-Type: application/json

{
  "hardware_domain": "qubit_degradation",
  "experiment": "fid",
  "times": [
    0,
    0.015748031496062992,
    0.031496062992125984,
    0.047244094488188976,
    0.06299212598425197,
    0.07874015748031496,
    0.09448818897637795,
    0.11023622047244094,
    0.12598425196850394,
    0.14173228346456693,
    0.15748031496062992,
    0.1732283464566929,
    0.1889763779527559,
    0.2047244094488189,
    0.2204724409448819,
    0.23622047244094488,
    0.25196850393700787,
    0.2677165354330709,
    0.28346456692913385,
    0.2992125984251969,
    0.31496062992125984,
    0.33070866141732286,
    0.3464566929133858,
    0.36220472440944884,
    0.3779527559055118,
    0.3937007874015748,
    0.4094488188976378,
    0.4251968503937008,
    0.4409448818897638,
    0.4566929133858268,
    0.47244094488188976,
    0.4881889763779528,
    0.5039370078740157,
    0.5196850393700787,
    0.5354330708661418,
    0.5511811023622047,
    0.5669291338582677,
    0.5826771653543307,
    0.5984251968503937,
    0.6141732283464567,
    0.6299212598425197,
    0.6456692913385826,
    0.6614173228346457,
    0.6771653543307087,
    0.6929133858267716,
    0.7086614173228346,
    0.7244094488188977,
    0.7401574803149606,
    0.7559055118110236,
    0.7716535433070866,
    0.7874015748031497,
    0.8031496062992126,
    0.8188976377952756,
    0.8346456692913385,
    0.8503937007874016,
    0.8661417322834646,
    0.8818897637795275,
    0.8976377952755905,
    0.9133858267716536,
    0.9291338582677166,
    0.9448818897637795,
    0.9606299212598425,
    0.9763779527559056,
    0.9921259842519685,
    1.0078740157480315,
    1.0236220472440944,
    1.0393700787401574,
    1.0551181102362204,
    1.0708661417322836,
    1.0866141732283465,
    1.1023622047244095,
    1.1181102362204725,
    1.1338582677165354,
    1.1496062992125984,
    1.1653543307086613,
    1.1811023622047243,
    1.1968503937007875,
    1.2125984251968505,
    1.2283464566929134,
    1.2440944881889764,
    1.2598425196850394,
    1.2755905511811023,
    1.2913385826771653,
    1.3070866141732282,
    1.3228346456692914,
    1.3385826771653544,
    1.3543307086614174,
    1.3700787401574803,
    1.3858267716535433,
    1.4015748031496063,
    1.4173228346456692,
    1.4330708661417322,
    1.4488188976377954,
    1.4645669291338583,
    1.4803149606299213,
    1.4960629921259843,
    1.5118110236220472,
    1.5275590551181102,
    1.5433070866141732,
    1.5590551181102361,
    1.5748031496062993,
    1.5905511811023623,
    1.6062992125984252,
    1.6220472440944882,
    1.6377952755905512,
    1.6535433070866141,
    1.669291338582677,
    1.68503937007874,
    1.7007874015748032,
    1.7165354330708662,
    1.7322834645669292,
    1.7480314960629921,
    1.763779527559055,
    1.779527559055118,
    1.795275590551181,
    1.811023622047244,
    1.8267716535433072,
    1.8425196850393701,
    1.858267716535433,
    1.874015748031496,
    1.889763779527559,
    1.905511811023622,
    1.921259842519685,
    1.937007874015748,
    1.952755905511811,
    1.968503937007874,
    1.984251968503937,
    2
  ],
  "baseline_trace": [
    1,
    0.9983,
    0.9794,
    0.9431,
    0.8895,
    0.8193,
    0.7336,
    0.6338,
    0.5222,
    0.4011,
    0.2733,
    0.1415,
    0.0089,
    -0.1217,
    -0.2476,
    -0.3664,
    -0.4759,
    -0.5744,
    -0.6608,
    -0.734,
    -0.7937,
    -0.8396,
    -0.8719,
    -0.8909,
    -0.8969,
    -0.8903,
    -0.8715,
    -0.841,
    -0.7989,
    -0.7457,
    -0.6817,
    -0.6071,
    -0.5227,
    -0.429,
    -0.3271,
    -0.2182,
    -0.104,
    0.0137,
    0.1326,
    0.2505,
    0.3646,
    0.4725,
    0.5716,
    0.6597,
    0.7346,
    0.7949,
    0.8392,
    0.8669,
    0.8779,
    0.8725,
    0.8514,
    0.8159,
    0.7674,
    0.7074,
    0.6378,
    0.5602,
    0.4762,
    0.3874,
    0.2951,
    0.2005,
    0.1045,
    0.008,
    -0.088,
    -0.1829,
    -0.2756,
    -0.3653,
    -0.4507,
    -0.5307,
    -0.6038,
    -0.6685,
    -0.7232,
    -0.7664,
    -0.7967,
    -0.813,
    -0.8143,
    -0.8002,
    -0.7707,
    -0.7262,
    -0.6675,
    -0.5962,
    -0.514,
    -0.423,
    -0.3254,
    -0.2238,
    -0.1204,
    -0.0176,
    0.0825,
    0.1781,
    0.2678,
    0.3505,
    0.4251,
    0.4914,
    0.5489,
    0.5976,
    0.6373,
    0.6682,
    0.6901,
    0.703,
    0.7066,
    0.7008,
    0.6851,
    0.6593,
    0.6231,
    0.5765,
    0.5194,
    0.4524,
    0.3761,
    0.2916,
    0.2004,
    0.1043,
    0.0052,
    -0.0944,
    -0.1923,
    -0.2861,
    -0.3735,
    -0.4524,
    -0.5213,
    -0.5786,
    -0.6237,
    -0.6558,
    -0.6752,
    -0.682,
    -0.6771,
    -0.6612,
    -0.6356,
    -0.6012,
    -0.5593,
    -0.5108
  ],
  "current_trace": [
    1,
    0.9975,
    0.9779,
    0.9409,
    0.8868,
    0.8162,
    0.7302,
    0.6305,
    0.5191,
    0.3984,
    0.2711,
    0.1402,
    0.0087,
    -0.1207,
    -0.2453,
    -0.3625,
    -0.4703,
    -0.5672,
    -0.6518,
    -0.7233,
    -0.7813,
    -0.8257,
    -0.8567,
    -0.8745,
    -0.8795,
    -0.8723,
    -0.8532,
    -0.8227,
    -0.781,
    -0.7286,
    -0.6657,
    -0.5926,
    -0.51,
    -0.4186,
    -0.3192,
    -0.2131,
    -0.102,
    0.0125,
    0.1281,
    0.2424,
    0.3531,
    0.4576,
    0.5535,
    0.6385,
    0.7106,
    0.7683,
    0.8104,
    0.8365,
    0.8462,
    0.84,
    0.8188,
    0.7837,
    0.7361,
    0.6776,
    0.6101,
    0.5351,
    0.4543,
    0.3691,
    0.2809,
    0.1906,
    0.0993,
    0.0077,
    -0.0833,
    -0.173,
    -0.2608,
    -0.3455,
    -0.4263,
    -0.5019,
    -0.571,
    -0.6322,
    -0.6839,
    -0.7248,
    -0.7534,
    -0.7686,
    -0.7697,
    -0.7561,
    -0.7278,
    -0.6852,
    -0.6293,
    -0.5614,
    -0.4833,
    -0.3969,
    -0.3045,
    -0.2085,
    -0.1111,
    -0.0146,
    0.0792,
    0.1684,
    0.2517,
    0.3281,
    0.3969,
    0.4576,
    0.51,
    0.5542,
    0.5902,
    0.6179,
    0.6376,
    0.649,
    0.6521,
    0.6467,
    0.6323,
    0.6087,
    0.5755,
    0.5328,
    0.4804,
    0.4187,
    0.3485,
    0.2705,
    0.1863,
    0.0975,
    0.0059,
    -0.0861,
    -0.1765,
    -0.2629,
    -0.3433,
    -0.4157,
    -0.4785,
    -0.5305,
    -0.5708,
    -0.5992,
    -0.6157,
    -0.6206,
    -0.6147,
    -0.599,
    -0.5744,
    -0.5423,
    -0.5035,
    -0.4592
  ],
  "shots_per_point": 1000,
  "metadata": {
    "workflow": "qubit_degradation_energy_routing",
    "fixture_policy": "paired baseline/current traces with shared noise draw"
  }
}

• Works under the validated FID/Gaussian T₂* input contract.
• Synthetic baseline/current traces should share the same noise draw; only decay parameter should change.
• Does not reduce cryostat base load directly.
• Energy saving is routing-unit estimate, not direct electricity-meter measurement.

QEC syndrome — persistent leakage-island detection

The qec_syndrome branch detects spatiotemporal persistence, not raw syndrome density. High-density random syndrome noise may PASS if defects are nonpersistent. Production requires ≥512 rounds of binary syndrome frames (values 0 or 1). Use 600–900 rounds for chiplet-style demos; the 2-round shape below is illustrative only and will be rejected by the API.

Diagnose fixtures (GPT / integrations)

When clients cannot upload large syndrome_frames arrays (e.g. ChatGPT Actions), use server-side fixtures. Claim level: api_level_structural_evidence_only.

QEC energy-routing policy (Probe 04 Policy C): 300 scenarios, 900 API calls, 0 API errors; baseline unsafe skip 23.5% → Policy C unsafe skip 0%; false escalation 0%; clustered leakage escalation 100%; retry rate 15.7%; safe policy estimated saving 30.1%. Policy C is client-side aggregation, not a backend model change. Does not claim cryostat/base-power reduction. Energy saving is estimated from routing units.

Example response (NV diamond)

Illustrative only — not the response from the runnable NV payload above. The live NV diagnose example (500-point trace, prefilter: ma11) typically returns FLAG on production. Shape below matches a real FLAG response; your metrics may differ.

Try It Now

Test /api/characterise or /api/v1/diagnose. Paste JSON with samples, or domain-specific diagnose bodies (not all domains use trace).

What We Detect

The product defines twelve mathematical signatures. Each asks a structural question — not “is this a known protocol?” but “is this signal doing something mathematically unusual?” Seven are live in API v1.0; five are on the roadmap (product direction, not yet returned in phenomena_detected).

Calculation notes (thresholds, heuristics, pipeline): PHENOMENA_CALCULATIONS.md in the API source repository.

Quick Start

Characterise

Domain diagnose

QEC diagnose fixture (no syndrome payload)

What this does not do

• Does not run a quantum computer.
• Does not certify diamond purity.
• Does not replace DEER spectroscopy.
• Does not prove Majorana/topology.
• Does not directly measure electricity savings.
• Does not reduce cryostat base power directly.
• Does not prove a physical particle.
• Does not prove hardware quasi-particle compute.
• Sparseical PC Compute evidence is repo-side and finite/bounded unless explicitly framed as abstract-machine proof assumptions.

Forbidden claim: This proves a new physical particle.

Quantum sparse compute (hardware validated)

Three experiments on ibm_kingston (127-qubit heavy-hex, Open Plan) establish that sparse signal structure reduces quantum work for anomaly detection. Full write-up: API_MASTER.md Appendix G.

Scripts: sparse_quantum_ibm.py, ss_quantum_v2.py, ss_quantum_v3.py. The SWAP test uses identical circuits for sparse and dense; savings are in shots (circuit executions), not gate count. Safe claim: sparse anomalies are more distinguishable in amplitude space and need fewer IBM runs to confirm at 95% confidence.

Sparseical routes

Sparseical Candidate v0 routes expose sparse-state evidence, canonical packets, gatekeeper/cascade checks, QEC carry, evidence pack summaries, and hardware capture validation. Hardware capture PASS is not proof of a physical particle, hardware quasi-particle, bare-metal compute, or Turing completeness.

Majorana 2 / tetron governor (handoff v0): majorana2_governor.mjs (15 unit smokes — npm run test:governor), majorana2_prescreener.mjs (10 unit smokes — npm run test:prescreener), extract_data.py (Zenodo H5 → JSON). Parity triage uses fitted τZ directly (no API); topo/CQ use live diagnose + hardware upload. Do not post raw zmpr IQ to qubit_degradation. CQ capture: telegraph_mode: true, device: tetron_cq. Docs: API_MASTER.md Appendix F, docs/MAJORANA2_HANDOFF_V0.md, results MAJORANA2_PRESCREENER_V0_RESULTS.md (13,439 points, 2,818 flagged). IBM Kingston sparse-compute: Appendix G.

Probes 11–16 and PC Compute Runtime are repo-side artefacts. They are not live Worker execution routes.

Website / interactive docs: signal.sparse-supernova.com/#api-docs