# Effects of strong electron interactions and resonance scattering on power output of nano-devices

## TL;DR

This paper presents a Fermi-liquid approach to analyze how strong electron interactions and resonance scattering influence the power output of nano-devices, revealing conditions for power enhancement near quantum bounds.

## Contribution

It introduces a novel Fermi-liquid based method to study power output in strongly interacting nano-devices, specifically analyzing SU(N) Kondo impurities and their potential for power enhancement.

## Key findings

- Power output can reach 50% of the quantum upper bound.
- Proper tuning of electron occupancy enhances power linearly with Kondo degeneracy.
- Interaction effects can surpass non-interacting device performance.

## Abstract

We develop a Fermi-liquid based approach to investigate the power output of nano devices in the presence of strong interactions and resonance scattering. The developed scheme is then employed to study the power output of a SU($N$) Kondo impurity at the strong-coupling regime. The interplay between Kondo resonance and the filling-factors in the SU($N$) quantum systems is found to be a key to enhance output power. Such enhancement results an output power corresponding to $50\%$ of the quantum upper bound. We demonstrate that given a proper tuning of the electron occupancy, the investigated power grows linearly with degeneracy of Kondo state ($N$). This relation can hence be exploited to obtain output power that is larger than the one in existing non interacting setups.