Consider a particle in a potential with energy eigenstates l) and corresponding increasing energies Ej with j - 0,1,2,.... The particle starts in the ground state (a) Suppose the quantity A satisfies [H, A] 0. What is the probability that the particle is no longer in the ground state after measuring A then H with no elapsed time? (b) Suppose the quantity B satisfies [H,B-0 and has eigenstates lOg). What is the probability that the particle is no longer in the ground state after measuring B then H with no elapsed time?
