Fractional shot noise in the kondo regime.
Transport through quantum dots in the Kondo regime obeys an effective low-temperature theory in terms of weakly interacting quasiparticles. Despite the weakness of the interaction, we find that the backscattering current and hence the shot noise are dominated by two-quasiparticle scattering. We show that the simultaneous presence of one- and two-quasiparticle scattering results in a universal average charge 5/3e as measured by shot-noise experiments. An experimental verification of our prediction would constitute a most stringent test of the low-energy theory of the Kondo effect.
Sela
Eran
E
Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.
Oreg
Yuval
Y
von Oppen
Felix
F
Koch
Jens
J