Transport through multiply connected quantum wires

Details Transport through multiply connected quantum wires Transport through multiply connected quantum wires

2003-10-30

arxiv.org/abs/cond-mat/0310713v1

Phys. Rev. B 70, 155420 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 7 figures

Scientific paper

10.1103/PhysRevB.70.155420

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.

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