Multiple choice
This circuit is measured once in the computational basis. What is P(|0000⟩)?
const c = circuit(4); c.h(0); c.h(1); c.h(2); c.h(3); c.cz(0, 1); c.cz(1, 2); c.cz(2, 3); c.cz(3, 0); return c;
Commit your prediction for P(|0000⟩) — then run it.