Is the quantum dot at large bias a weak-coupling problem?

Details Is the quantum dot at large bias a weak-coupling problem? Is the quantum dot at large bias a weak-coupling problem?

2000-12-01

arxiv.org/abs/cond-mat/0012005v3

Phys. Rev. Lett. 86, 4088 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Four pages with embedded figures; references added; minor changes to the text

Scientific paper

10.1103/PhysRevLett.86.4088

We examine the two-lead Kondo model for a d.c. 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.

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