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 distance between protons versus the pressure. The black squares are our results in the mobile model, and the red circles are LeSar’s results.[8]