Multiple choice
For this circuit, what is the probability that measuring all 4 qubits yields exactly |0011⟩ (qubit 0 leftmost)?
const c = circuit(4); // 1. distribute two Bell pairs c.h(0); c.cx(0, 1); c.h(2); c.cx(2, 3); // 2. bilateral CNOT (Alice and Bob each apply one locally) c.cx(0, 2); c.cx(1, 3); return c;
Commit your prediction for P(|0011⟩) — then run it.