Probing nonclassicality in an optically-driven cavity with two atomic ensembles

TL;DR

This paper investigates nonclassical features in a cavity with two atomic ensembles, demonstrating various quantum correlations and effects, and how external driving enhances nonclassicality in an open quantum system.

Contribution

It introduces a detailed analysis of nonclassicality in a cavity with two atomic ensembles, considering different configurations and external driving within an open quantum system framework.

Findings

Nonclassical features like sub-Poissonian statistics and squeezing are observed.

External optical driving enhances nonclassicality.

Multiple facets of nonclassicality are demonstrated and analyzed.

Abstract

The possibility of observing nonclassical features in a physical system comprised of a cavity with two ensembles of two-level atoms has been investigated by considering different configurations of the ensembles with respect to the Node and Antinode of the cavity field under the framework of open quantum systems. The study reveals the strong presence of nonclassical characters in the physical system by establishing the existence of many facets of nonclassicality, such as the sub-Poissonian boson statistics and squeezing in single modes, intermodal squeezing, intermodal entanglement, antibunching, and steering. The effect of a number of parameters, characterizing the physical system, on the different aspects of nonclassicality are also investigated. Specifically, it is observed that the depth of the nonclassicality witnessing parameters can be enhanced by externally driving one of the ensembles with an optical field. The work is done in the presence of open system effects, in particular, use is made of Langevin equations along with a suitable perturbative technique.