Using molecular dynamics computer simulations we investigate the dynamics of supercooled silica in the frequency range 0.5-20~THz and the wave-vector range 0.13-1.1\AA^{-1}. We find that for small wave-vectors the dispersion relations are in very good agreement with the ones found in experiments and that the frequency at which the boson-peak is observed shows a maximum at around 0.39\AA^{-1}.
@article{arxiv.cond-mat/9710012,
title = {The Dynamics of Supercooled Silica: Acoustic modes and Boson peak},
author = {Juergen Horbach and Walter Kob and Kurt Binder},
journal= {arXiv preprint arXiv:cond-mat/9710012},
year = {2009}
}