2 papers
cond-mat1999
Optimal orbitals from energy fluctuations in correlated wave functions
Stephen Fahy, Claudia Filippi
A quantum Monte Carlo method of determining Jastrow-Slater wave functions for which the energy is stationary with respect to variations in the single-particle orbitals is presented…
cond-mat1996
Generalized gradient approximations to density functional theory: comparison with exact results
Claudia Filippi, Xavier Gonze, C. J. Umrigar
In order to assess the accuracy of commonly used approximate exchange-correlation density functionals, we present a comparison of accurate exchange and correlation potentials, exch…