{
  "ok": true,
  "route": "/api/cirq-bell-pair",
  "mode": "CIRQ_BELL_PAIR",
  "purpose": "Initiate, verify, and draft a Bell pair circuit artifact for governed runtime handoff.",
  "boundaries": [
    "This route verifies ideal Bell pair math in Node.",
    "This route does not execute Cirq Python runtime directly.",
    "Hardware execution claims require external runtime/provider receipts."
  ],
  "methods": {
    "GET": "Return Bell pair draft and ideal verification payload.",
    "POST": "Return Bell pair draft, ideal verification, and sampled measurement counts."
  },
  "timestamp": "2026-10-28T10:06:33.126Z",
  "draft": {
    "id": "bell_pair_phi_plus",
    "qubits": [
      "q0",
      "q1"
    ],
    "steps": [
      {
        "order": 1,
        "gate": "H",
        "target": "q0"
      },
      {
        "order": 2,
        "gate": "CNOT",
        "control": "q0",
        "target": "q1"
      },
      {
        "order": 3,
        "gate": "MEASURE",
        "targets": [
          "q0",
          "q1"
        ],
        "key": "m"
      }
    ],
    "targetState": "(|00> + |11>) / sqrt(2)",
    "cirqDraft": "import cirq\nq0, q1 = cirq.LineQubit.range(2)\ncircuit = cirq.Circuit(\n    cirq.H(q0),\n    cirq.CNOT(q0, q1),\n    cirq.measure(q0, q1, key='m')\n)"
  },
  "verification": {
    "amplitudes": {
      "10": {
        "re": 0,
        "im": 0
      },
      "11": {
        "re": 0.7071067811865475,
        "im": 0
      },
      "00": {
        "re": 0.7071067811865475,
        "im": 0
      },
      "01": {
        "re": 0,
        "im": 0
      }
    },
    "probabilities": {
      "10": 0,
      "11": 0.5,
      "00": 0.5,
      "01": 0
    },
    "correlationZZ": 1,
    "concurrence": 1,
    "entangled": true,
    "verificationChecks": {
      "normalized": true,
      "antiCorrelatedInvalidStatesZero": true,
      "bellPhiPlusStructure": true
    }
  }
}