Spinor Stochastic Resonance

TL;DR

This paper demonstrates spinor stochastic resonance in a microcavity-polariton system, showing noise-induced spin state switching and resonance behavior, supported by experimental and theoretical analysis.

Contribution

It introduces the concept of spinor stochastic resonance in a microcavity-polariton system, combining experimental evidence with theoretical modeling.

Findings

Resonance behavior observed in spin amplification and SNR as noise varies

Coherent switching between metastable spin states achieved

Theoretical results match experimental data

Abstract

We report on noise-induced-spin-ordering in a collective quasipaticle system: spinor stochastic resonance. Synergetic interplay of a polarization-modulated signal and a polarization-noise allows us to switch coherently between the two metastable states of a microcavity-polariton spin bistable system. Spinor stochastic resonance is demonstrated in a zero-dimensional GaAs based microcavity. The resonance behavior of both the spin amplification and the signal-to-noise ratio are experimentally evidenced as a function of the noise strength for different amplitude modulations. They are theoretically reproduced using a spinor- Gross-Pitaevskii equation driven by a randomly polarized laser field.