Angle resolved photon spectrum and quasiparticle excitation spectrum in an exciton superfluid

TL;DR

This paper analyzes the unique photon emission and quasiparticle spectra of exciton superfluids in semiconductor bilayers, revealing distinctive features that differentiate them from other condensed matter systems.

Contribution

It provides a detailed evaluation of angle-resolved photon spectra and quasiparticle excitations in exciton superfluids, highlighting their unique emission characteristics.

Findings

Photon emission from exciton superfluids has distinctive features.

Evaluated angle-resolved photon spectrum and quasiparticle excitation spectrum.

Comments on experimental data in exciton and exciton-polariton systems.

Abstract

There have been extensive experimental search for possible exciton superfluid in semiconductor electron-hole bilayer systems below liquid Helium temperature. However, exciton superfluid are meta-stable and will eventually decay through emitting photons. Here we show that the light emitted from the excitonic superfluid has unique and unusual features not shared by any other atomic or condensed matter systems. We evaluate angle resolved photon spectrum, momentum distribution curve, energy distribution curve and quasiparticle excitation spectrum in the exciton superfluid and comment on relevant experimental data in both exciton and exciton-polariton systems.