Full Counting Statistics of Spin-Flip/Conserving Charge Transitions in Pauli-Spin Blockade

TL;DR

This paper analyzes the full counting statistics of charge transitions in a quantum dot system under Pauli-spin blockade, revealing unique features linked to spin degeneracy and transition dynamics.

Contribution

It introduces a theoretical model to evaluate all spin-related transition rates and links FCS with waiting time distributions in quantum dots.

Findings

Identification of parity effects in FCS

Discovery of tail structures due to transition coexistence

Insights into spin-related transition dynamics

Abstract

We investigate the full counting statistics (FCS) of spin-conserving and spin-flip charge transitions in Pauli-spin blockade regime of a GaAs double quantum dot. A theoretical model is proposed to evaluate all spin-conserving and spin-flip tunnel rates, and to demonstrate the fundamental relation between FCS and waiting time distribution. We observe the remarkable features of parity effect and a tail structure in the constructed FCS, which do not appear in the Poisson distribution, and are originated from spin degeneracy and coexistence of slow and fast transitions, respectively. This study is potentially useful for elucidating the spin-related and other complex transition dynamics in quantum systems.