Non-equilibrium DC noise in a Luttinger liquid with impurity

Details Non-equilibrium DC noise in a Luttinger liquid with impurity Non-equilibrium DC noise in a Luttinger liquid with impurity

1996-01-24

arxiv.org/abs/cond-mat/9601117v1

Physics

Condensed Matter

10 pages with one figure, uses revtex and epsf

Scientific paper

10.1103/PhysRevB.54.10845

We compute exactly the non-equilibrium DC noise in a Luttinger liquid with an impurity and an applied voltage. By generalizing Landauer transport theory for Fermi liquids to interacting, integrable systems, we relate this noise to the density fluctuations of quasiparticles. We then show how to compute these fluctuations using the Bethe ansatz. The non-trivial density correlations from the interactions result in a substantial part of the non-equilibrium noise. The final result for the noise is a scaling function of the voltage, temperature and impurity coupling. It may eventually be observable in tunneling between edges of a fractional quantum Hall effect device.

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