Multiple choice
Run this circuit, then measure all 2 qubits at once. What is the probability of the joint outcome |10⟩ (qubit 0 leftmost)?
const c = circuit(2); const t = Math.PI / 4; c.cx(0, 1); c.rz(2 * t, 1); c.cx(0, 1); c.rx(2 * t, 0); return c;
Commit your prediction for P(|10⟩) — then run it.