- A (spin^12 ) electron is in an eigenstate ofSywith eigenvalue− ̄h 2 att= 0. The particle is in a
magnetic fieldB~= (0, 0 ,B) which makes the Hamiltonian for the systemH=μBBσz. Find
the spin state of the particle as a function of time. Find the probability to measureSy= + ̄h 2
as a function of time.