Homework Statement
Here it is: a particle in 1-d infinite potential well starts in state \Psi(x,0) = A Sin^{3}(\pi*x/a): 0\leqx\leqa.
Express \Psi(x,0) as a superposition in the basis of the solutions of the time independent schrodinger eq for this system, \phi_{n}(x) = (2/a)^{1/2}...