Enhanced Photon Squeezing in Two-Photon Dicke Model

TL;DR

This paper investigates photon quadrature squeezing in the Two-Photon Dicke Model, revealing maximal squeezing near the unbounded region and critical behavior close to the quantum phase transition, with potential for prolonged squeezing.

Contribution

It provides a detailed analysis of photon squeezing behavior in the Two-Photon Dicke Model, highlighting the unbounded region as optimal for maximal and prolonged squeezing, and explores critical phenomena.

Findings

Maximal photon squeezing occurs near the unbounded region.

Squeezing exceeds the standard quantum limit in the superradiant phase.

Prolonged squeezing is achieved only in the unbounded region.

Abstract

We explore the phenomena of quadrature squeezing of photons in the Two-Photon Dicke Model under the mean-field approximation in the thermodynamic limit. The strength of photon squeezing is maximized in the region where the coupling strength is of the same order of magnitude as one of the fundamental frequency of the system. This particular region is termed as the unbounded region. The squeezing of the photonic quadratures can be observed only in the superradiant phase where the squeezing is well beyond the standard quantum limit both near the quantum critical point as well as the unbounded region. However, prolonged squeezing is only obtained in the latter case. Furthermore, we explore the critical behavior of photon squeezing near the unbounded region.