{
  "schema": 2,
  "date": "2026-09-14",
  "status": "completed internal CPU evaluation on i9; independent external confirmation pending",
  "model": "open nearest-neighbour quantum circuits conserving a fixed excitation count; not general-purpose 40-qubit simulation",
  "hardware": "Intel Core i9-10900K; 62 GiB RAM; Linux; one CPU thread per method; RTX 3090 not used",
  "reference": "ffsim 0.0.83; faster of two tested calling variants, not every possible ffsim optimisation",
  "precision": "complex128",
  "repetitions_per_method_case": 9,
  "program_seeds": [
    101,
    202,
    303
  ],
  "repetitions_per_seed": 3,
  "total_runs": 312,
  "functional_tests_passed": 68,
  "timing": "post-import wall time including fresh preparation, computation, full model output evaluation and serialisation; our method also includes native process startup and JSON transfer/parse; excludes website, queue, network and animation",
  "accuracy": {
    "l2_limit": 1e-9,
    "largest_observed_non_mps_l2_error_against_ffsim": 3.613365468276353e-15,
    "mps_results_above_error_limit": 45,
    "execution_failures": 0
  },
  "cases": [
    {
      "qubits": 12,
      "excitations": 2,
      "layers": 12,
      "own_median_ms": 5.669387988746166,
      "ffsim_median_ms": 13.316163793206215
    },
    {
      "qubits": 12,
      "excitations": 6,
      "layers": 12,
      "own_median_ms": 8.398067206144333,
      "ffsim_median_ms": 34.46029778569937
    },
    {
      "qubits": 18,
      "excitations": 3,
      "layers": 12,
      "own_median_ms": 8.597678504884243,
      "ffsim_median_ms": 34.382651560008526
    },
    {
      "qubits": 22,
      "excitations": 3,
      "layers": 12,
      "own_median_ms": 11.33901160210371,
      "ffsim_median_ms": 57.44823068380356
    },
    {
      "qubits": 30,
      "excitations": 2,
      "layers": 30,
      "own_median_ms": 13.419905677437782,
      "ffsim_median_ms": 95.65976168960333
    },
    {
      "qubits": 40,
      "excitations": 2,
      "layers": 40,
      "own_median_ms": 21.151729859411716,
      "ffsim_median_ms": 191.46086554974318
    }
  ],
  "limits": [
    "No quantum advantage established",
    "No general speed record or novelty claim",
    "45 Aer-MPS results are excluded from equal-accuracy speed comparisons",
    "Dense statevector runs at 30 and 40 sites were not attempted due to the resource preflight",
    "These results cannot predict Grover lock-search speed",
    "Internal implementation and research source are not part of this public report",
    "No CPU pinning or fixed frequency; internal evaluation, not an externally isolated benchmark"
  ]
}