Observation of nonequilibrium motion and equilibration in polariton rings

  title={Observation of nonequilibrium motion and equilibration in polariton rings},
  author={Shouvik Mukherjee and David M. Myers and Rosaria G. Lena and Burcu Ozden and Jonathan Beaumariage and Z. Sun and Mark Steger and Loren N. Pfeiffer and Ken W. West and Andrew J. Daley and David W. Snoke},
  journal={Physical Review B},
We present a study of the macroscopic dynamics of a polariton condensate formed by non-resonant optical excitation in a quasi-one-dimensional ring-shaped microcavity. The presence of a gradient in the cavity photon energy creates a macroscopic trap for the polaritons in which a single mode condensate is formed. With time- and energy-resolved imaging we show the role of interactions in the motion of the condensate as it undergoes equilibration in the ring. These experiments also give a direct… 

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