“…For example, the mesh cannot be arbitrarily small, otherwise the Coulomb potential would be double-counted by the Poisson equation and the BTE. Since the long-range part of the Coulomb potential is responsible for the many-body effects, the mesh size has to be determined consistently with, say, the renormalized electron (kinetic) energy calculated from the many-body theory [33]. This is, of course, not an easy task, especially, for the case of small device structures.…”