Spinor stochastic resonance

H Abbaspour (1) , Stephane Trebaol (2) , F Morier-Genoud (1) , Marcia Portella-Oberli (1) , B Deveaud (1)

1 LOEQ - Laboratory of Quantum Optoelectronics
2 FOTON - Fonctions Optiques pour les Technologies de l'informatiON

We report on noise-induced spin ordering in a collective quasiparticle 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 behaviors 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.

Domaines: Gaz Quantiques [cond-mat.quant-gas]; Optique [physics.optics]

H Abbaspour, Stephane Trebaol, F Morier-Genoud, Marcia Portella-Oberli, B Deveaud. Spinor stochastic resonance. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 91 (15), pp.155307. ⟨10.1103/PhysRevB.91.155307⟩. ⟨hal-01145056⟩