Multiple choice
Run this circuit, then measure all 3 qubits at once. What is the probability of the joint outcome |111⟩ (qubit 0 leftmost)?
const c = circuit(3); // Prepare the data qubit in |+> = (|0> + |1>)/sqrt(2). c.h(0); // Spread it across the code block with two CNOTs. c.cx(0, 1); c.cx(0, 2); return c;
Commit your prediction for P(|111⟩) — then run it.