Dear all, It has reference to 2.3.2 of "More interesting systems :Kwant 1.0.3 documentation". I have some confusions and/or misconceptions in the code of that quantum well study. These are as under: (i) in segment "# potential profile" does the scattering region mean one dimensional? I have the idea that the scattering region is two dimensional free and one dimensional bound and for size effect in this dimension several channels evolve. Scattering therefore happens from channel(s) in one lead to channel(s) in other lead with due attention to the quantized bound levels. I fail to extract this underlying physics in this part of the program. (ii) in segment "def onsite(site,pot=0):" are the onsite Hamiltonians given to the lattice sites of two dimensional region? I am misunderstood and at a loss. I want to be clear and specific which dimension is restricted to evolve the bound states? and which the other two free making a real quantum well. Once I understand that I may manipulate the number of channels and number of bound states to modify the transport. Also, if I am not wrong, the ballistic transport should be considered in the leads only; then it is the lead only where dimensionality should be considered! but I do not find this method in the lead. May be I am wrong! still then I await your wise answer to my confusions. Thanks. K.K.Ghosh mail: kk_ghosh@rediffmail.com