Phase separation of multicomponent excitonic Bose-Einstein condensates

TL;DR

This paper investigates the phase separation in multicomponent excitonic Bose-Einstein condensates in cuprous oxide, using theoretical models to predict density profiles and luminescence spectra that indicate phase separation.

Contribution

It introduces a theoretical analysis of phase separation phenomena in multi-component excitonic BECs within a 3D trap, based on Hartree-Fock-Bogoliubov theory.

Findings

Density profiles show clear signatures of phase separation.

Luminescence spectra reveal distinguishable features of condensed phases.

Theoretical predictions align with potential experimental observations.

Abstract

For the observation of Bose-Einstein condensation, excitons in cuprous oxide are regarded as promising candidates due to their large binding energy and long lifetime. High particle densities may be achieved by entrapment in a stress induced potential. We consider a multi-component gas of interacting para- and orthoexcitons in cuprous oxide confined in a three-dimensional potential trap. Based on the Hartree-Fock-Bogoliubov theory, we calculate density profiles as well as decay luminescence spectra which exhibit signatures of the separation of the Bose-condensed phases.