Abbaspour, H.Trebaol, S.Morier-Genoud, F.Portella-Oberli, M. T.Deveaud, B.2015-05-292015-05-292015-05-29201510.1103/PhysRevB.91.155307https://infoscience.epfl.ch/handle/20.500.14299/114269WOS:000353031600005We 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.text::journal::journal article::research article