V. Gasparian et al., TUNNELING AND DWELL TIME FOR ONE-DIMENSIONAL GENERALIZED KRONIG-PENNEY MODEL, Physica. B, Condensed matter, 233(1), 1997, pp. 72-77
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.