Parametric Couplings in Engineered Quantum Systems

TL;DR

This paper discusses how parametric couplings in engineered quantum systems enable enhanced control and interaction between different energy scales, with a focus on harmonic oscillators and amplifier engineering.

Contribution

It introduces fundamental principles of parametric couplings and presents examples of engineered parametric amplifiers with improved performance.

Findings

Parametric couplings facilitate communication between systems of different energy scales.

Engineered parametric amplifiers can outperform conventional setups.

The chapter highlights applications in linearly coupled harmonic oscillators.

Abstract

Parametric couplings in engineered quantum systems are a powerful tool to control, manipulate and enhance interactions in a variety of platforms. It allows us to bring systems of different energy scales into communication with each other. This short chapter introduces the basic principles and discusses a few examples of how one can engineer parametric amplifiers with improved characteristics over conventional setups. Clearly, the selected examples are author-biased, and other interesting proposals and implementations can be found in the literature. The focus of this chapter is on parametric effects between linearly coupled harmonic oscillators, however, parametric modulation is also applicable with nonlinear couplings and anharmonic systems.