A potential-well based formulation to calculate the quantized conductance of a one-atom constriction

We show that the quantized conductance of a quasi-one-dimensional atomic electrical conductor is approximately proportional to the number of conducting channels (which become quantized modes), when this number is large enough, by deriving firstly Fermi velocity within a quantum-box based approach. The essential aspects related to the quantized conductance are discussed in terms of longitudinal conduction modes.