Quantum simulations of light-matter interactions in arbitrary coupling regimes

TL;DR

This paper reviews recent advances in quantum simulations of light-matter interactions across various coupling regimes, highlighting experimental platforms, benefits, and challenges in this rapidly evolving field.

Contribution

It provides a comprehensive overview of quantum simulation techniques for light-matter interactions in exotic coupling regimes, emphasizing recent experimental realizations and future prospects.

Findings

Quantum simulations have been successfully implemented in trapped ions, superconducting circuits, cold atoms, and quantum photonics.

Exotic coupling regimes like ultrastrong and deep strong coupling are now accessible through quantum simulations.

Challenges include controlling complex interactions and scaling quantum platforms for broader applications.

Abstract

Light-matter interactions are an established field that is experiencing a renaissance in recent years due to the introduction of exotic coupling regimes. These include the ultrastrong and deep strong coupling regimes, where the coupling constant is smaller and of the order of the frequency of the light mode, or larger than this frequency, respectively. In the past few years, quantum simulations of light-matter interactions in all possible coupling regimes have been proposed and experimentally realized, in quantum platforms such as trapped ions, superconducting circuits, cold atoms, and quantum photonics. We review this fledgling field, illustrating the benefits and challenges of the quantum simulations of light-matter interactions with quantum technologies.