{
  "schema": "wai.quantum.exercise/1",
  "id": "superposition",
  "translations": { "zh-CN": "machine-assisted: to be reviewed by a fluent reader before it is advertised" },
  "title": { "en": "Superposition", "zh-CN": "叠加" },
  "task": {
    "en": "One qubit. Make its measurement give 0 and 1 each with probability exactly one half.",
    "zh-CN": "一个量子比特。让它的测量以恰好二分之一的概率分别给出 0 和 1。"
  },
  "starter": [
    "OPENQASM 3.0;",
    "include \"stdgates.inc\";",
    "qubit[1] q;",
    "bit[1] c;",
    "// your gate here",
    "c = measure q;"
  ],
  "intent": { "distribution": { "0": 0.5, "1": 0.5 } },
  "hints": {
    "en": [
      "You need a state whose two amplitudes have the same size.",
      "The Hadamard gate takes |0⟩ to an equal mix of |0⟩ and |1⟩."
    ],
    "zh-CN": [
      "你需要一个两个振幅大小相同的状态。",
      "Hadamard 门把 |0⟩ 变成 |0⟩ 与 |1⟩ 的等量组合。"
    ]
  },
  "reference": [
    "OPENQASM 3.0;",
    "include \"stdgates.inc\";",
    "qubit[1] q;",
    "bit[1] c;",
    "h q[0];",
    "c = measure q;"
  ],
  "wrong": [
    {
      "fails": "intent",
      "note": "a flip is certain, not a superposition",
      "qasm": ["OPENQASM 3.0;", "include \"stdgates.inc\";", "qubit[1] q;", "bit[1] c;", "x q[0];", "c = measure q;"]
    }
  ]
}