Spatial coherence of exciton-polaritoniс Bose‒Einstein condensates

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Abstract

Dynamics of exciton-polariton Bose‒Einstein condensate in an optical microcavity is considered. A novel version of stochastic Gross‒Pitaevsky equation for description of condensate evolution under non-Markovian interaction with environment is proposed. Using the proposed version, analysis of condensate dynamics for various temperatures is carried out. The phase transition from a homogeneous to fragmented condensate state near temperature of 15 K is found. This phase transition is accompanied by drop of condensate density and decrease of correlation length. It is found that correlation length oscillates with time for the temperature of 10 K. The results obtained indicate the necessity to take into account non-Markovianity of condensate interaction with the excitonic reservoir.

About the authors

N. V. Kuznetsova

Ilyichev Pacific Oceanological Institute of the Far East Branch of the Russian Academy of Sciences

Email: makarov@poi.dvo.ru
Russian Federation, Vladivostok

D. V. Makarov

Ilyichev Pacific Oceanological Institute of the Far East Branch of the Russian Academy of Sciences

Author for correspondence.
Email: makarov@poi.dvo.ru
Russian Federation, Vladivostok

N. A. Asriyan

Dukhov Research Institute of Automatics

Email: makarov@poi.dvo.ru
Russian Federation, Moscow

A. A. Elistratov

Dukhov Research Institute of Automatics

Email: makarov@poi.dvo.ru
Russian Federation, Moscow

Yu. E. Lozovik

Institute of Spectroscopy of the Russian Academy of Sciences; Higher School of Economics

Email: makarov@poi.dvo.ru
Russian Federation, Moscow; Moscow

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