Quantum Condensation of Exciton-Polaritons

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  • Yamamoto Yoshihisa
    国立情報学研究所量子情報国際研究センター:スタンフォード大学ギンツトン研究所
  • Utsunomiya Shoko
    国立情報学研究所量子情報国際研究センター

Bibliographic Information

Other Title
  • 励起子ポラリトンの量子凝縮 （解説）
  • 励起子ポラリトンの量子凝縮
  • レイキコ ポラリトン ノ リョウシ ギョウシュク

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Description

An exciton-polariton is a hybrid quasi-particle (elementary excitation) consisting of strongly coupled quantum well exciton and planar microcavity photon. Since the effective mass of an exciton-polariton is four orders of magnitude lighter than the exciton mass and ten orders of magnitude lighter than the alkali atom mass, the exciton-polariton is expected to satisfy a quantum degeneracy condition and feature dynamic condensation at high temperatures and low densities. In contrast to superfluid He liquids and dilute atomic Bose-Einstein condensates at thermal equilibrium condition, the exciton-polariton condensate is inherently a non-equilibrium open system so that it may open new frontiers in statistical mechanics. In this review article, we will focus on the distinction between the exciton-polariton condensation and normal laser oscillation, the experimental evidences for the Berezinskii-Kosterlitz-Thouless phase transition, the Bogoliubov excitation spectrum and the dynamical condensation at high orbital p-wave or d-wave states.

Journal

  • Butsuri

    Butsuri 67 (2), 96-107, 2012-02-05

    The Physical Society of Japan

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