Is the Quantum Dot at Large Bias a Weak-Coupling Problem?

P. Coleman, C. Hooley, and O. Parcollet
Phys. Rev. Lett. 86, 4088 – Published 30 April 2001
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Abstract

We examine the two-lead Kondo model for a dc-biased quantum dot in the Coulomb blockade regime. From perturbative calculations of the magnetic susceptibility, we show that the problem retains its strong-coupling nature, even at bias voltages larger than the equilibrium Kondo temperature. We give a speculative discussion of the nature of the renormalization group flows and the strong-coupling state that emerges at large voltage bias.

  • Received 12 December 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.4088

©2001 American Physical Society

Authors & Affiliations

P. Coleman1, C. Hooley1,2, and O. Parcollet1

  • 1Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854
  • 2School of Physics and Astronomy, Birmingham University, Edgbaston, Birmingham B15 2TT, United Kingdom

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Vol. 86, Iss. 18 — 30 April 2001

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