title: What determines the wave function of electron-hole pairs in polariton condensates?
abstract: The ground state of a microcavity polariton Bose-Einstein condensate is determined by considering experimentally tunable parameters such as excitation density and detuning. During a change in the ground state of Bose-Einstein condensate from excitonic to photonic, which occurs as the excitation density is increased, the origin of the binding force of electron-hole pairs changes from Coulomb to photon-mediated interactions. The change in the origin gives rise to the strongly bound pairs with a small radius, like Frenkel excitons, in the photonic regime. The phase diagram obtained provides valuable information that can be used to build theoretical models for each regime.
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan. kamide@acty.phys.sci.osaka-u.ac.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Kamide
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Ogawa