Geminal wavefunctions have been employed to model strongly-correlated electrons. These wavefunctions represent products of weakly-correlated pairs of electrons and reasonable approximations are computable with polynomial cost. In particular, Richardson-Gaudin states have recently been employed as a variational ansatz. This contribution serves to explain the Richardson-Gaudin wavefunctions in the conventional language of quantum chemistry.
@article{arxiv.2009.08349,
title = {Richardson-Gaudin geminal wavefunctions in a Slater determinant basis},
author = {Charles-Émile Fecteau and Frédéric Berthiaume and Meriem Khalfoun and Paul Andrew Johnson},
journal= {arXiv preprint arXiv:2009.08349},
year = {2020}
}