Variational and diffusion Monte Carlo simulations of a hydrogen molecular ion in a spherical box

Xiao Xuehui, Bao Kuo^†, Wang Youchun, Xie Hui, Duan Defang, Tian Fubo, Cui Tian^‡

The pressure versus the corresponding density. The black squares are our results, and the red circles are LeSar’s results.^[8] At the low density, our results are basically the same as those of LeSar, but as the density increases, our results are higher than LeSar’s results.