TUNNELING AND DWELL TIME FOR ONE-DIMENSIONAL GENERALIZED KRONIG-PENNEY MODEL

We obtain exact expressions for the density of states and the traversa l and dwell times of particles travelling through one-dimensional gene ralized Kronig-Penney models, consisting of periodic arrays of arbitra ry sets of delta-potentials. We reduce the problem to the calculation of the properties of one unit cell. For the specific case of two delta -functions per unit cell, we are able to get explicit analytical expre ssions of the previous magnitudes.