Multiple choice
For qubit 0 after this circuit, what is ⟨X⟩, the X-axis projection of its Bloch vector?
const c = circuit(1);
// H = e^{iπ/2} Rz(π/2) Rx(π/2) Rz(π/2). Circuit order applies left-to-right,
// and grading ignores the global phase.
c.rz(Math.PI / 2, 0);
c.rx(Math.PI / 2, 0);
c.rz(Math.PI / 2, 0);
return c;Commit your prediction for ⟨X⟩ of qubit 0 — then run it.