Turbulence in a Bose-Einstein Condensate of Dipolar Excitons in Coupled Quantum Wells

TL;DR

This paper investigates the nonlinear dynamics and turbulence formation in a Bose-Einstein condensate of dipolar excitons within coupled quantum wells, modeled by a generalized Gross-Pitaevskii equation under experimental conditions.

Contribution

It introduces a generalized Gross-Pitaevskii model accounting for local interactions dependent on exciton distribution, and demonstrates turbulence emergence at high pumping frequencies.

Findings

Dipolar excitons BEC can be described by a generalized Gross-Pitaevskii equation.

High-frequency pumping leads to a steady turbulent state.

Turbulence formation depends on exciton distribution and external pumping conditions.

Abstract

The nonlinear dynamics of a Bose-Einstein condensate (BEC) of dipolar excitons trapped in an external confining potential in coupled quantum wells is analysed. It is demonstrated that under typical experimental conditions the dipolar excitons BEC can be described by a generalized Gross-Pitaevskii equation with the local interaction between the excitons, which depends on the exciton distribution function. It is shown that, if the system is pumped at sufficiently high frequencies, a steady turbulent state can be formed.