Shot noise near the unitary limit of a Kondo quantum dot

TL;DR

This paper investigates shot noise in a Kondo quantum dot near the unitary limit, providing detailed calculations of current fluctuations that could inform measurements of effective charge carriers.

Contribution

It offers a non-mean-field calculation of shot noise using Keldysh technique at zero temperature, advancing understanding beyond previous mean field approaches.

Findings

Shot noise depends on applied voltage near the unitary limit.

Results suggest potential for measuring effective charge carriers.

Calculations complement earlier mean field studies.

Abstract

We examine the statistics of current fluctuations in a junction with a quantum dot described by Kondo Hamiltonian. With the help of Keldysh technique we calculate shot noise as a function of applied voltage at zero temperature using the fix-point Hamiltonian. These calculations are complementary to similar ones performed earlier in the mean field slave boson approximation. The results may be relevant for measurement of effective charge carriers.