Bose-Einstein condensation of 2D dipolar excitons: Quantum Monte Carlo simulation

TL;DR

This paper uses diffusion Monte Carlo simulations to study Bose-Einstein condensation of 2D dipolar excitons, revealing they form strongly correlated systems that can condense more readily than weakly correlated excitons.

Contribution

It provides the first detailed numerical analysis of 2D dipolar excitons' condensation and correlation properties using quantum Monte Carlo methods.

Findings

Dipolar excitons form strongly correlated systems in coupled quantum wells.

Bose condensation of dipolar excitons is more experimentally accessible than for ideal excitons.

Simulation results include correlation, microscopic, thermodynamic, and spectral characteristics.

Abstract

The Bose condensation of 2D dipolar excitons in quantum wells is numerically studied by the diffusion Monte Carlo simulation method. The correlation, microscopic, thermodynamic, and spectral characteristics are calculated. It is shown that, in structures of coupled quantum wells, in which low-temperature features of exciton luminescence have presently been observed, dipolar excitons form a strongly correlated system. Their Bose condensation can experimentally be achieved much easily than for ideal or weakly correlated excitons.