title: Size consistency error in the antisymmetric geminal power wave function can be completely removed.
abstract: The accurate but expensive product of geminals ansatz may be approximated by a geminal power, but this approach sacrifices size consistency. Here, we show both analytically and numerically that a size consistent form very similar to the product of geminals can be recovered using a network of location-specific Jastrow factors. Upon variational energy minimization, the network creates particle number projections that remove the charge fluctuations responsible for size inconsistency. This polynomial cost approach captures strong many-electron correlations, giving a maximum error of just 1.8 kcal/mol during the double-bond dissociation of H(2)O in an STO-3G atomic orbital basis.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, USA. eric.neuscamman@gmail.com
authors.forename: Eric
authors.initials: E
authors.lastname: Neuscamman