Multistability of a two component exciton-polariton fluid
  We study the stability of a multicomponent exciton-polariton fluid under resonant excitation within the linear response approximation of a generalized Gross-Pitaevskii equation. We show that, two spatially homogeneous and independently tunable pumping lasers produce, for the same values of the system parameters, up to three stable solutions. Three-stability is understood by noting that the cavity can be either little or highly populated and, in this second case, the largest part of the population lies in either one of the two components. Moreover, we show that easily tunable multistable hysteresis loops can be performed by the system. 
E. Cancellieri, F. M. Marchetti, M. H. Szymanska, C. Tejedor
cond-mat.mes-hall cond-mat.quant-gas