Resistance quantum
= Resistance quantum
{title2=$R_K=h/e^2$}
The scale $R_K=h/e^2\simeq25.8\ \mathrm{k\Omega}$. <Spin degeneracy> perfectly transmitting channels instead have conductance $2e^2/h$. Suppressing charge fluctuations in a simple tunnel-island picture requires <nanowire junction resistance>s large relative to $h/e^2$.