Stochastic Formation of Polariton Condensates in Two Degenerate Orbital   States
  We explore the exciton-polariton condensation in the two degenerate orbital states. In the honeycomb lattice potential, at the third band we have two degenerate vortex-antivortex lattice states at the inequivalent K and K'-points. We have observed energetically degenerate condensates within the linewidth ~ 0.3 meV, and directly measured the vortex-antivortex lattice phase order of the order parameter. We have also observed the intensity anticorrelation between polariton condensates at the K- and K'-points. We relate this intensity anticorrelation to the dynamical feature of polariton condensates induced by the stochastic relaxation from the common particle reservoir. 
Kenichiro Kusudo, Na Young Kim, Andreas Loeffler, Sven Hoefling,   Alfred Forchel and Yoshihisa Yamamoto
cond-mat.mes-hall