Dynamical Instability of a Nonequilibrium Exciton-Polariton Condensate

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Details

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalACS Photonics
Volume5
Issue number1
Publication statusPublished - 17 Jan 2018
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • Institute of Physics of the Polish Academy of Sciences
  • Imperial College London
  • Polytechnique Montreal

Abstract

By imaging single-shot realizations of an organic polariton quantum fluid, we observe the long-sought dynamical instability of nonequilibrium condensates. We find an excellent agreement between the experimental data and a numerical simulation of the open-dissipative Gross-Pitaevskii equation, without performing any parameter fitting, which allows us to draw several important conclusions about the physics of the system. We find that the reservoir dynamics are in the strongly nonadiabatic regime, which renders the complex Ginzburg-Landau description invalid. The observed transition from stable to unstable fluid can only be explained by taking into account the specific form of reservoir-mediated instability as well as particle currents induced by the finite extent of the pump spot.

    Research areas

  • Bose-Einstein condensation, dynamical instability, exciton-polariton, organic condensate

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