Twofold advance in the theoretical understanding of far-from-equilibrium properties of interacting nanostructures.
We calculate the full I-V characteristics at vanishing temperature in the self-dual interacting resonant level model in two ways. The first uses careful time dependent density matrix renormalization group with a large number of states per block and a representation of the reservoirs as leads subjected to a chemical potential. The other is based on integrability in the continuum limit, and generalizes early work by Fendley, Ludwig, and Saleur on the boundary sine-Gordon model. The two approaches are in excellent agreement, and uncover among other things a power law decay of the current at large voltages when U>0.
Laboratoire MPQ, CNRS UMR 7162, Université Paris Diderot, 75205 Paris Cedex 13.
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Boulat
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Saleur
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Schmitteckert