Radiative impedance of one-dimensional ballistic channels in FET devices

For electrons otherwise freely accelerating in a one-dimensional ballistic channel FET device, it is shown theoretically that the radiative impedance for a single band without magnetic field is quantised at the value R 1 =( pi h(cross)/e 2 ). Other implications that the quantum electrodynamic photon radiation viewpoint may have for electron processes within the channel are briefly discussed.