Exciton condensation in quantum wells. Excitonic hydrodynamics. Autosolitons

TL;DR

This paper develops hydrodynamics equations for indirect excitons in quantum wells, revealing new autsoliton solutions and analyzing the impact of localized states on emission spectra.

Contribution

It introduces a comprehensive hydrodynamic model for excitons considering phase formation, pumping, finite lifetime, and defects, leading to discovery of novel autsoliton solutions.

Findings

Discovery of bright and dark autsolitons in exciton density

Analysis of localized and free exciton states on emission spectra

Hydrodynamic equations incorporating exciton phase and defect effects

Abstract

The hydrodynamics equations for indirect excitons in the double quantum wells are obtained taking into account 1) a possibility of an exciton condensed phase formation, 2) the presence of a pumping, 3) the finite value of the exciton lifetime, 4) the exciton scattering by defects.New types of solutions in the form of bright and dark autsolitons are obtained for the exciton density. The role of localized and free exciton states is analyzed in a formation of the emission spectra.