Full counting statistics of the two-stage Kondo effect

Abstract

We developed a theoretical framework which extends the method of \textit{full counting statistics} (FCS) from conventional single channel Kondo screening schemes to multi-channel Kondo paradigm. The developed idea of FCS has been demonstrated considering an example of two-stage Kondo (2SK) model. We analyzed the charge transferred statistics in the strong-coupling regime of a 2SK model using non-equilibrium Keldysh formulation. A bounded value of Fano factor, $1\le F\le 5/3$, confirmed the cross-over regimes of charge transfered statistics in 2SK effect, from Poissonian to super-Poissonian. An innovative way of measuring transport properties of 2SK effect, by the independent measurements of charge current and noise, has been proposed

10 pages with 5 figures (Published version)

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• Multistage Kondo effect in a multiterminal geometry: A modular quantum interferometer
• Transmission phase evolution in fully screened and overscreened Kondo impurities
• Noise signatures of a charged Sachdev-Ye-Kitaev dot in mesoscopic transport