Novel approach to nonlinear susceptibility
Mesoscale and Nanoscale Physics
2007-05-23 v1 Strongly Correlated Electrons
Abstract
The calculation of the third order susceptibility still is a long standing fundamental problem of particular importance in nonlinear nanooptics: Indeed, cancellation of size-dependent terms coming from uncorrelated excitations is expected, but up to now shown for very simple Hamiltonians only. Using a many-body theory recently developed to handle interacting close-to-bosons, we prove it here for \emph{arbitrary} H. This new formalism actually provides the first clean way to calculate nonlinear susceptibilities, with results different from previous ones.
Cite
@article{arxiv.cond-mat/0311387,
title = {Novel approach to nonlinear susceptibility},
author = {M. Combescot and O. Betbeder-Matibet and K. Cho and H. Ajiki},
journal= {arXiv preprint arXiv:cond-mat/0311387},
year = {2007}
}