The procedure adopted to calculate the ground state wave-function (n = 1) and energy (E1) can be extended to higher values of n (n = 2, 3, … etc) as well. The left (x < 0) and right (x > 0) localized components of the eigenfunctions of the energy operator for n = 2 and n = 3 (the first and the second excited states of the system) are reported in Table along with their respective energy eigenvalues. Ψ nL and Ψ nR can be seen to have the same energy eigenvalue