Hi, So in the steady state Schrodinger equation (SE), the E on the RHS (see http://scienceworld.wolfram.com/physics/SchroedingerEquation.html) is the sum of the kinetic and potential energy of the electron. However, is this the same as the 'internal energy'? The statistical distribution used to describe electrons is the Fermi-Dirac, where the exponential terms contain 'E' and 'mu'. So is this E the same as that in the SE equation? Also, if E is the total sum of the KE and PE of the electron, what aspect of the energy of the electron is described by the chemical potential 'mu'?