Polariton-polariton scattering: exact results through a novel approach
Abstract
We present a fully microscopic approach to the transition rate of two exciton-photon polaritons. The non-trivial consequences of the polariton composite nature -- here treated exactly through a development of our composite-exciton many-body theory -- lead to results noticeably different from the ones of the conventional approaches in which polaritons are mapped into elementary bosons. Our work reveals an appealing fundamental scattering which corresponds to a photon-assisted exchange -- in the absence of Coulomb process. This scattering being dominant when one of the scattered polaritons has a strong photon character, it should be directly accessible to experiment. In the case of microcavity polaritons, it produces a significant enhancement of the polariton transition rate when compared to the one coming from Coulomb interaction. This paper also contains the crucial tools to securely tackle the many-body physics of polaritons, in particular towards its possible BEC.
Keywords
Cite
@article{arxiv.0705.3189,
title = {Polariton-polariton scattering: exact results through a novel approach},
author = {M. Combescot and M. -A. Dupertuis and O. Betbeder-Matibet},
journal= {arXiv preprint arXiv:0705.3189},
year = {2009}
}
Comments
To be published in Europhysics Letters