Dear Marc, Please have a look at the corresponding documentation: https://kwant-project.org/doc/1/reference/generated/kwant.operator.Current#kwant.operator.Current <https://kwant-project.org/doc/1/reference/generated/kwant.operator.Current#kwant.operator.Current>
The density n_i = psi_i^* psi_i has unit 1/energy. The current between two sites i and j j_ij = i (psi_i^* H_ij psi_j - cc ) therefore is dimensionless if I am not mistaken. The question about adding e/h or area is not related to Kwant but to how you actually discretized your initial continuous problem. Best regards, Xavier > Le 13 févr. 2020 à 21:38, Marc Vila <marc.v...@icn2.cat> a écrit : > > Dear Kwant developers, > > What are the units of the output of the current density operator? The units > of the density operator is per area per energy, so the units of current are > (e/h)* per area * energy? > > Thanks a lot. > > Bests, > > Marc
