Long Josephson junctions with exciton-polariton condensates

TL;DR

This paper explores the creation and stabilization of Josephson $$-junctions using exciton-polariton condensates, enabling potential room-temperature quantum technologies.

Contribution

It demonstrates stable Josephson $$-junction stripes in polariton condensates and analyzes their stability and vortex formation at different pumping levels.

Findings

Stable $$-junctions achieved at low pumping.

High pumping induces vortex dipoles.

Static lattices of Josephson vortices can be stabilized.

Abstract

We demonstrate the possibility to build stable Josephson $\pi$-junction stripes with exciton-polariton condensates. The stability of the $\pi$-junction between arbitrary long polariton stripes is achieved at low pumping by balancing the snaking instability with counter-propagating flows towards the junction. Not dissimilar from a dark soliton, the instability becomes relevant at high pumping leading to formation of vortex dipoles. The resulting structures can be stabilised to produce static lattices of Josephson vortices in straight and ring geometries. Our results build towards realization of quantum technological applications based on the Josephson effect at room temperature.