  We study transport through multiply coupled carbon nano-tubes (quantum wires)
and compute the conductances through the two wires as a function of the two
gate voltages $g_1$ and $g_2$ controlling the chemical potential of the
electrons in the two wires. We find that there is an {\it equilibrium}
cross-conductance, and we obtain its dependence on the temperature and length
of the wires. The effective action of the model for the wires in the strong
coupling (equivalently Coulomb interaction) limit can also be mapped to a
system of capacitively coupled quantum dots. We thus also obtain the
conductances for identical and non-identical dots. These results can be
experimentally tested.
