@article {JJAPS.26S3.685,
title = {Many Body Theory of the Formation and Dynamics of Excitons in an Electron-Hole Gas at Low Temperatures},
journal = {Japanese Journal of Applied Physics},
volume = {26S3},
number = {Supplement 26-3-1},
year = {1987},
pages = {685-686},
publisher = {The Japan Society of Applied Physics},
abstract = {Using functional differentiation to obtain the two-particle Green{\textquoteright}s functions, we give a systemmatic discussion of the collective modes in an electron-hole gas at low temperatures. Our analysis is based on the well known pairing approximation for the single particle self-energies and corresponds to the generalized RPA. The excitons with finite momentum appear as fluctuations of the electron-hole condensate and have a linear dispersion relation (Keldysh and Kozlov).},
url = {http://jjap.ipap.jp/link?JJAPS/26S3/685/},
author = {Ren{\'e} C{\^o}t{\'e} and Griffin, A.}
}