Abstract
We examine the properties of a dc-biased quantum dot in the Coulomb blockade regime. For voltages that are large compared to the Kondo temperature , the physics is governed by the scales and , where is the nonequilibrium decoherence rate induced by the voltage-driven current. Based on scaling arguments, self-consistent perturbation theory, and perturbative renormalization group, we argue that due to the large the system can be described by renormalized perturbation theory in . However, in certain variants of the Kondo problem, two-channel Kondo physics is induced by a large voltage .
- Received 4 May 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.156802
©2001 American Physical Society