# Non-Fermi-liquid Kondo screening under Rabi driving

## TL;DR

This paper explores how Rabi driving in a two-channel quantum dot induces a two-stage, non-Fermi-liquid Kondo effect, revealing complex screening phenomena through theoretical and numerical analysis.

## Contribution

It introduces a Rabi-Kondo model demonstrating non-Fermi-liquid behavior in a driven quantum dot, combining bosonization and numerical renormalization group methods.

## Key findings

- Observation of two-stage Kondo screening with non-Fermi-liquid properties
- Identification of residual entropy indicating complex quantum states
- Analysis of emission spectrum revealing non-Fermi-liquid features

## Abstract

We investigate a Rabi-Kondo model describing an optically driven two-channel quantum dot device featuring a non-Fermi-liquid Kondo effect. Optically induced Rabi oscillation between the valence and conduction levels of the dot gives rise to a two-stage Kondo effect: Primary screening of the local spin is followed by secondary nonequilibrium screening of the local orbital degree of freedom. Using bosonization arguments and the numerical renormalization group, we compute the dot emission spectrum and residual entropy. Remarkably, both exhibit two-stage Kondo screening with non-Fermi-liquid properties at both stages.