Multiple choice
For qubit 0 after this circuit, what is ⟨X⟩, the X-axis projection of its Bloch vector?
const c = circuit(1); c.rx(Math.PI / 2, 0); // pi/2 pulse: tip into the equatorial plane c.rz(Math.PI / 2, 0); // Larmor precession about z by pi/2 return c;
Commit your prediction for ⟨X⟩ of qubit 0 — then run it.