# Spin-valley resolved photon-assisted tunneling in carbon nanotube double quantum dots

## TL;DR

This paper investigates photon-assisted tunneling and Landau-Zener-Stueckelberg interference in carbon nanotube double quantum dots, revealing how PAT can resolve spin-flip and intervalley transitions without background signals.

## Contribution

It introduces an atomistic and time-dependent approach to analyze PAT and LZS in carbon nanotube quantum dots, highlighting their potential for spin-valley resolution.

## Key findings

- Reproduces LZS interference patterns observed experimentally.
- Shows PAT can resolve spin-flip and intervalley transitions.
- Demonstrates PAT's effectiveness in Pauli-blocked charge configurations.

## Abstract

We consider the photon-assisted tunneling (PAT) and the Landau-Zener-Stueckelberg (LZS) interference for double quantum dots induced electrostatically along a semiconducting carbon nanotube. An atomistic tight-binding approach and the time-dependent configuration interaction method are employed for description of the systems of a few confined electrons and holes. We reproduce the patterns of the LZS interference recently observed for the quantum double dots describing transport across hole-localized states. Moreover, we indicate that for charge configurations for which the ground-state is Pauli blocked PAT can be used for resolution of the transitions that involve spin-flip or intervalley transitions without the spin-valley conserving background signal.