Nongalvanic thermometry for ultracold two-dimensional electron domains

TL;DR

This paper proposes a nongalvanic thermometry method using quantum point contacts and quantum dots to measure ultracold two-dimensional electron gases with minimal disturbance.

Contribution

It introduces a novel nongalvanic thermometry technique suitable for ultracold 2D electron systems, addressing limitations of existing methods.

Findings

The proposed thermometer delivers virtually no power to the electron system.

It effectively measures temperatures of a few millikelvin in 2D electron gases.

The method is theoretically analyzed for feasibility and performance.

Abstract

Measuring the temperature of a two-dimensional electron gas at temperatures of a few mK is a challenging issue, which standard thermometry schemes may fail to tackle. We propose and analyze a nongalvanic thermometer, based on a quantum point contact and quantum dot, which delivers virtually no power to the electron system to be measured.