Electric and heat transport in a charge two-channel Kondo device

TL;DR

This paper investigates charge and heat transport in a charge two-channel Kondo device, providing exact solutions near the Emery-Kivelson point and making predictions for future experiments.

Contribution

It offers a comprehensive analysis of out-of-equilibrium and thermal transport in the charge two-channel Kondo model, including exact results at the Emery-Kivelson point.

Findings

Exact solutions for transport near the Emery-Kivelson point

Predictions for experimental signatures of charge and heat transport

Analysis of regimes where the model applies to real devices

Abstract

Motivated by the experimental realization of a multi-channel charge Kondo device [Iftikhar et al., Nature 526, 233 (2015)], we study generic charge and heat transport properties of the charge two-channel Kondo model. We present a comprehensive discussion of the out-of-equilibrium and time-dependent charge transport, as well as thermal transport within linear response theory. The transport properties are calculated at, and also in the vicinity of, the exactly solvable Emery-Kivelson point, which has the form of a Majorana fermion resonant level model. We focus on regimes where our solution gives exact results for the physical quantum dot device, and highlight new predictions relevant to future experiments.