Creation and detection of vortices in polariton condensates

TL;DR

This paper theoretically explores how quantized vortices are created, persist, and can be detected in nonequilibrium polariton condensates, highlighting their relation to superfluidity and proposing measurement methods.

Contribution

It introduces a stochastic classical field model to analyze vortex dynamics and proposes three methods to measure vorticity in polariton condensates.

Findings

Vortex lifetime increases with spatial coherence.

Vortex lifetime depends on condensate geometry.

Three measurement methods for vorticity are proposed.

Abstract

We investigate theoretically the creation, persistence and detection of quantized vortices in nonequilibrium polariton condensates within a stochastic classical field model. The life time of the quantized vortices is shown to increase with the spatial coherence and to depend on the geometry of the condensate. The relation with superfluidity in conventional superfluids is discussed. Three different ways to measure the vorticity of the polariton condensate are proposed.