Quantum criticality out of equilibrium: steady state in a magnetic single-electron transistor.

@article{Kirchner2009QuantumCO,
  title={Quantum criticality out of equilibrium: steady state in a magnetic single-electron transistor.},
  author={S. Kirchner and Q. Si},
  journal={Physical review letters},
  year={2009},
  volume={103 20},
  pages={
          206401
        }
}
Quantum critical systems out of equilibrium are of extensive interest, but are difficult to study theoretically. We consider here the steady-state limit of a single-electron transistor with ferromagnetic leads. In equilibrium (i.e., bias voltage V = 0), this system features a continuous quantum phase transition with a critical destruction of the Kondo effect. We construct an exact quantum Boltzmann treatment in a dynamical large-N limit, and determine the universal scaling functions of both the… Expand
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