Predict the output
This circuit is sampled for 1024 shots on the seeded simulator (seed 1233). How many of the shots come out |0000⟩? Estimate P(|0000⟩) × 1024 and pick the closest option.
const c = circuit(4); // 1 & 2: two elementary Bell pairs c.h(0); c.cx(0, 1); c.h(2); c.cx(2, 3); // 3: Bell-state measurement on the repeater qubits (inverse entangler) c.cx(1, 2); c.h(1); // 4: feed-forward corrections onto Bob's qubit (deferred-measurement form) c.cx(2, 3); // X correction conditioned on q2 c.cz(1, 3); // Z correction conditioned on q1 // 5 c.measure(); return c;
Commit your prediction for counts of |0000⟩ over 1024 shots — then run it.