A polaritonic two-component Bose-Hubbard model

TL;DR

This paper demonstrates how polaritons in micro-cavity arrays can realize a two-component Bose-Hubbard model with tunable parameters, offering a platform for exploring complex quantum many-body phenomena.

Contribution

It introduces a novel two-component Bose-Hubbard model using polaritons with protected atomic states and proposes a measurement method for polariton number statistics.

Findings

Polaritons form a two-component Bose-Hubbard model in micro-cavity arrays.

The model's parameters are tunable via external laser driving.

A method to measure polariton number statistics in individual cavities is proposed.

Abstract

We show that polaritons in an array of interacting micro-cavities with strong atom-photon coupling can form a two-component Bose-Hubbard model. Both polariton species are thereby protected against spontaneous emission as their atomic part is stored in two ground states of the atoms. The parameters of the effective model can be tuned via the driving strength of external lasers. We also describe a method to measure the number statistics in one cavity for each polariton species independently.