Permanent Rabi oscillations in coupled exciton-photon systems with PT-symmetry

TL;DR

This paper introduces a mechanism for achieving permanent Rabi oscillations in exciton-polariton systems using PT-symmetry and reservoir engineering, enabling potential applications in integrated circuits.

Contribution

It demonstrates that PT-symmetry can sustain non-decaying Rabi oscillations in driven-dissipative exciton-polariton condensates through a specific pumping regime.

Findings

Permanent Rabi oscillations occur under PT-symmetry conditions.

Oscillations can have unequal exciton and photon amplitudes.

Reservoir engineering enables sustained oscillations in microcavities.

Abstract

We propose a physical mechanism which enables permanent Rabi oscillations in driven-dissipative condensates of exciton-polaritons in semiconductor microcavities subjected to external magnetic fields. The method is based on incoherent excitonic reservoir engineering. We demonstrate that permanent non-decaying oscillations may appear due to the parity-time (PT) symmetry of the coupled exciton-photon system realised in a specific regime of pumping to the exciton state and depletion of the reservoir. For effective non-zero exciton-photon detuning, permanent Rabi oscillations occur with unequal amplitudes of exciton and photon components. Our predictions pave way to realisation of integrated circuits based on exciton-polariton condensates.