Stability and Excitations of Spontaneous Vortices in Homogeneous Polariton Condensates

TL;DR

This paper investigates the stability, structure, and excitation energies of spontaneously formed vortices in homogeneous polariton condensates, revealing their dependence on pump strength and condensate density.

Contribution

It provides new insights into the stability and excitation properties of spontaneous vortices in homogeneous microcavity-polariton condensates.

Findings

Vortices are stable and form spontaneously without external stirring.

Vortex visibility increases with pump strength.

Vortex radius inversely proportional to square root of condensate density.

Abstract

We study the dynamics of spontaneously formed vortices in homogeneous microcavity-polariton condensates (MPCs). We find that vortices are stable and appear spontaneously without stirring or rotating MPCs. The dip of the vortex core contains some background of reservoir polaritons and the visibility of a vortex is increasing with respect to the pump strength. The vortex radius is inversely proportional to the square root of the condensate density. Excitation energies of vortices at high and low pump powers are finite and zero, respectively. Vortices at low pump powers exhibit the short lifetime.