2.1 Consider the spin-precession problem discussed in the text. It can also be solved in the Heisenberg picture. Using the Hamiltonian eB H== S₂ = WSz, mc write the Heisenberg equations of motion for the time-dependent operators Sx(t), Sy(t), and Sz(t). Solve them to obtain Sx,y,z as functions of time.

2.1 Consider the spin-precession problem discussed in the text. It can also be solved in the Heisenberg picture. Using the Hamiltonian eB H== S₂ = WSz, mc write the Heisenberg equations of motion for the time-dependent operators Sx(t), Sy(t), and Sz(t). Solve them to obtain Sx,y,z as functions of time.