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Thursday, February 5th 2009

1:25 pm:

We develop an exact non-perturbative framework to compute the nonequilibrium steady state properties

of quantum impurities connected to leads subject to source-drain voltage. We show that in the open system limit the

non-equilibrium physics is captured by open system eigenstates de¯ned with boundary conditions set by the leads.

The eigenstates are current carrying and entropy producing, with the dissipation inherent in the limit.

We construct these eigenstates by means of a recently introduced Scattering (or Open) Bethe Ansatz approach, a

generalization to nonequilibrium of the Thermodynamic (or Closed) Bethe Ansatz. We compute the I(V) curve of the

Interacting Resonance Level and observe a Fermi Edge Singularity out of equilibrium as the impurity level approaches

resonance. We then apply the approach to the quantum dot (the nonequilibrium Anderson Impurity model) and

observe the formation of the Kondo peak as the gate voltage is decreased and the peak destruction as the source-drain

voltage is increased.

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