title: Is the quantum dot at large bias a weak-coupling problem?
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.
authors.affiliation: Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: P
authors.initials: P
authors.lastname: Coleman
authors.forename: C
authors.initials: C
authors.lastname: Hooley
authors.forename: O
authors.initials: O
authors.lastname: Parcollet