Superfluidity of indirect excitons in a quantum dot

TL;DR

This paper investigates the superfluidity and Bose-Einstein condensation of indirect excitons in two-dimensional quantum dots using Monte Carlo simulations, analyzing temperature effects and predicting behavior in large systems.

Contribution

It introduces a detailed simulation study of exciton superfluidity in quantum dots and applies Kosterlitz-Thouless theory to predict large-system behavior.

Findings

Superfluid and Bose-condensed fractions vary with temperature and interaction strength.

Superfluidity persists at finite temperatures in quantum dots.

Predicted superfluid behavior in large, macroscopic systems.

Abstract

The superfluidity and Bose-Einstein condensation of indirect excitons in two-dimensional quantum dot are studied by path-integral Monte Carlo simulations. The temperature dependence of superfluid and bose-condensed fraction are calculated at different strengths of interaction. Using the Kosterlitz-Thouless recursion relations, we also predict behavior of superfluid fraction in macroscopic large systems.