Quantum noise minimization in transistor amplifiers

TL;DR

This paper explores quantum limits on noise in transistor amplifiers, identifying conditions for quantum-limited performance and proposing an experimental approach based on measurable parameters, with a focus on resonant barrier transistors.

Contribution

It introduces a method to approach quantum-limited noise performance using measurable quantities and analyzes specific transistor types to guide experimental realization.

Findings

Identifies parameter regions for quantum-limited noise performance.

Provides a practical procedure for experimental approach.

Analyzes resonant barrier transistors as a case study.

Abstract

General quantum restrictions on the noise performance of linear transistor amplifiers are used to identify the region in parameter space where the quantum-limited performance is achievable and to construct a practical procedure for approaching it experimentally using only the knowledge of directly measurable quantities: the gain, (differential) conductance and the output noise. A specific example of resonant barrier transistors is discussed.