Predict the output
This circuit is sampled for 1024 shots on the seeded simulator (seed 9196). How many of the shots come out |1001⟩? Estimate P(|1001⟩) × 1024 and pick the closest option.
const c = circuit(4); c.x(0); c.h(1); c.cx(1, 2); // Entangle the control into A's ancilla, send the parity across the link. c.cx(0, 1); // Entangle B's ancilla into the target. c.cx(2, 3); // Feed-forward corrections (deferred-measurement form): c.cx(1, 3); // X correction on the target conditioned on q1 c.h(2); c.cz(2, 0); // Z correction on the control conditioned on q2 c.measure(); return c;
Commit your prediction for counts of |1001⟩ over 1024 shots — then run it.