Excitation of coherent polaritons in a two-dimensional atomic lattice

TL;DR

This paper introduces a novel two-dimensional polaritonic crystal formed by a lattice of atoms interacting with a quantized electromagnetic field, enabling full localization of polaritons and potential applications in quantum information storage.

Contribution

It presents the concept and analysis of a new type of polaritonic crystal structure, expanding the understanding of polariton localization and quantum degeneracy in such systems.

Findings

Conditions for quantum degeneracy of low-branch polariton gas identified

Analysis of quantum optical information recording potential

Demonstration of full polariton localization in the lattice

Abstract

We describe a new type of spatially periodic structure (lattice models): a polaritonic crystal (PolC) formed by a two-dimensional lattice of trapped two-level atoms interacting with quantised electromagnetic field in a cavity (or in a one-dimensional array of tunnelling-coupled microcavities), which allows polaritons to be fully localised. Using a one-dimensional polaritonic crystal as an example, we analyse conditions for quantum degeneracy of a low-branch polariton gas and those for quantum optical information recording and storage.