Electron correlation and double ionization of a 1D H2 in an intense laser field

Single and double electron ionization probabilities are calculated for a one-dimensional (1D) H-2 molecule from the exact numerical solution of the system's time-dependent Schrodinger equation (TDSE) at 800nm and intensities 10(13) W cm(-2) < I < 10(15) W cm(-2). Comparison is made for three electronic states, X-1 Sigma(g)(+), A(3)Sigma(u)(+) and B(1)Sigma(u)(+) of the molecule. Using the exact time-dependent densities of the three states allows for comparison of density functional probabilities obtained from exact one-electron densities with the exact probabilities.