Stable magnetic monopoles in spinor polariton condensates

TL;DR

This paper demonstrates the existence of stable magnetic monopole analogues in spinor polariton condensates, showing their dynamics under magnetic fields and their stability due to spin-anisotropic interactions.

Contribution

It introduces stable magnetic monopole-like excitations in spinor polariton condensates and analyzes their trajectories and stability under magnetic fields.

Findings

Magnetic monopole analogues accelerate under in-plane magnetic fields.

They propagate at high velocities and remain stable up to a critical field.

Stability is due to the spin-anisotropy of polariton interactions.

Abstract

We consider half-integer topological defects in a spinor Bose-Einstein condensate of exciton-polaritons. We show that they accelerate under the effect of an in-plane effective magnetic field, like regular electric charges in the electric field. The trajectories of these analogues of magnetic monopoles are derived analytically and checked by numerical simulations. We show that these "magnetic charges" propagate at large in-plane velocities and remain stable up to a critical magnetic field, thanks to the unique spin-anisotropy of polariton interactions.