Mesoscopic admittance of a double quantum dot

TL;DR

This paper calculates the mesoscopic admittance of a double quantum dot, showing its potential for spectroscopic analysis and detecting spin blockade effects, and explores its measurement via microwave techniques and coupling to photonic resonators.

Contribution

It introduces a method to compute the admittance of a double quantum dot and links it to microwave and photonic resonator measurements for spectroscopic insights.

Findings

Admittance $G()$ reveals spectroscopic info of DQD.

$G()$ is sensitive to Pauli spin blockade.

Resonator response can access $G()$ via photon correlation functions.

Abstract

We calculate the mesoscopic admittance $G(\omega)$ of a double quantum dot (DQD),which can be measured directly using microwave techniques. This quantity reveals spectroscopic information on the DQD and is also directly sensitive to a Pauli spin blockade effect. We then discuss the problem of a DQD coupled to a high quality photonic resonator. When the photon correlation functions can be developed along a random-phase-approximation-like scheme, the response of the resonator gives an access to $G(\omega)$.