Suppression of Zeeman splitting and polarization steps in localized exciton-polariton condensates

TL;DR

This paper investigates how exciton-polariton condensates in microcavities respond to magnetic fields, revealing suppression of Zeeman splitting and step-like polarization behavior influenced by particle interactions and condensate size.

Contribution

It demonstrates the quenching of Zeeman splitting and polarization steps in localized exciton-polariton condensates under magnetic fields, highlighting the role of interactions and particle number.

Findings

Zeeman splitting is suppressed in the condensate.

Polarization exhibits step-like increases with magnetic field.

Polarization step width depends on interaction constants.

Abstract

We show that the condensation of exciton-polaritons in semiconductor microcavities in an applied magnetic field manifests itself in the quenching of the Zeeman splitting of an elliptically polarized condensate. The circular polarization degree of a localized condensate with a finite number of particles increases as a function of the magnetic field with a step-like behavior. The width of each polarization step is fixed by the polariton-polariton interaction constants and the number of steps is fixed by the number of polaritons in the condensate. The magnetic susceptibility of the condensate depends qualitatively on the parity of the number of polaritons.