Multiple choice
Run this circuit, then measure all 3 qubits at once. What is the probability of the joint outcome |100⟩ (qubit 0 leftmost)?
const gamma = Math.PI / 8; const beta = Math.PI / 8; const c = circuit(3); c.h(0); c.h(1); c.h(2); // edge (0, 1) c.cx(0, 1); c.rz(-2 * gamma, 1); c.cx(0, 1); // edge (1, 2) c.cx(1, 2); c.rz(-2 * gamma, 2); c.cx(1, 2); // edge (0, 2) c.cx(0, 2); c.rz(-2 * gamma, 2); c.cx(0, 2); c.rx(2 * beta, 0); c.rx(2 * beta, 1); c.rx(2 * beta, 2); c.measure(); return c;
Commit your prediction for P(|100⟩) — then run it.