Output squeezed radiation from dispersive ultrastrong light-matter coupling

TL;DR

This paper predicts high-degree squeezed radiation output from a cavity photon mode coupled dispersively to an off-resonant bosonic excitation, enabled by time-modulated ultrastrong light-matter interactions, with potential applications in various spectral ranges.

Contribution

It introduces a method to generate squeezed light via dispersive ultrastrong coupling with time modulation, expanding possibilities for quantum light sources in different frequency domains.

Findings

High output squeezing predicted in dispersive ultrastrong coupling regime

Output squeezing enhanced by time modulation of interaction

Potential for squeezed light generation in GHz, THz, and mid-IR ranges

Abstract

We investigate the output generation of squeezed radiation of a cavity photon mode coupled to another off-resonant bosonic excitation. By modulating in time their linear interaction, we predict high degree of output squeezing when the dispersive ultrastrong coupling regime is achieved, i.e., when the interaction rate becomes comparable to the frequency of the lowest energy mode. Our work paves the way to squeezed light generation in frequency domains where the ultrastrong coupling is obtained, e.g., solid-state resonators in the GHz, THz and mid-IR spectral range.