# Double Quantum Dot scenario for spin resonance in current noise

## TL;DR

This paper demonstrates that interference effects in double quantum dots with spin-orbit coupling and Coulomb interactions produce current noise resonances at Larmor frequencies, explaining observed spin resonance phenomena in STM noise.

## Contribution

It introduces a double quantum dot model showing how interference and spin interactions cause measurable noise resonances, expanding understanding of spin resonance in quantum transport.

## Key findings

- Resonances occur at Larmor frequencies due to interference in double quantum dots.
- Resonance lines are comparable in strength to shot noise background.
- The model explains spin resonance observations in STM noise with non-polarized leads.

## Abstract

We show that interference between parallel currents through two quantum dots, in presence of spin orbit interactions and strong on-site Coulomb repulsion, leads to resonances in current noise at the corresponding Larmor frequencies. An additional resonance at the difference of Larmor frequencies is present even without spin-orbit interaction. The resonance lines have strength comparable to the background shot noise and therefore can account for the numerous observations of spin resonance in STM noise with non-polarized leads. We solve also several other models that show similar resonances.