A note about the ground state of the hydrogen molecule

Abstract

A trial function is presented for the $H_2$ molecule which provides the most accurate (the lowest) Bohr-Oppenheimer ground state energy among few-parametric trial functions (with $\le 14$ parameters). It includes the electronic correlation term in the form $\sim \exp (\gamma r_{12})$ where $\gamma$ is a variational parameter.

8 pages, 2 Tables, 18 references (the paper is essentially expanded, several references are added)