Multiple choice
For qubit 0 after this circuit, what is ⟨Y⟩, the Y-axis projection of its Bloch vector?
const theta = Math.PI / 2; const c = circuit(1); c.h(0); c.p(theta, 0); c.h(0); return c;
Commit your prediction for ⟨Y⟩ of qubit 0 — then run it.