Non-Gaussian two-mode squeezing and continuous variable entanglement of linearly and circularly polarized light beams interacting with cold atoms

TL;DR

This paper explores the generation of non-Gaussian entangled states of light through interactions with cold atoms, highlighting potential experimental realizations and the non-Gaussian nature of the resulting states.

Contribution

It introduces a method to generate non-Gaussian entangled states of light via atom-field interactions, expanding the understanding of quantum state engineering in optical systems.

Findings

Non-Gaussian entangled states can be generated with cold atoms and polarized light.

The non-Gaussian structure may be present in existing experimental systems.

Comparison with recent experiments supports the feasibility of the proposed method.

Abstract

We investigate how entangled coherent states and superpositions of low intensity coherent states of non-Gaussian nature can be generated via non-resonant interaction between either two linearly or circularly polarized field modes and an ensemble of X-like four-level atoms placed in an optical cavity. We compare our results to recent experimental observations and argue that the non-Gaussian structure of the field states may be present in those systems.