#H2+
Every note tagged #H2+, newest first — or browse the full archive.
Does force weight keep moving the H2+ crossover in Rana et al.'s 1/R scheme?
An independent H2+ implementation extends Rana et al.'s 2025 1/R Conundrum by sweeping force-loss weight over four decades; endpoint classifications change when the training budget is doubled.
Does force training move where Coulomb subtraction helps an H2+ neural potential?
A matched neural-network experiment on the one-electron H2+ curve asks whether adding force labels moves the bond-distance cutoff at which subtracting the exact nuclear repulsion stops helping the fit. Force labels sharpen the advantage against the repulsive wall but move the crossover inward, the opposite of the predicted direction.
Where Coulomb subtraction helps a neural potential fit
A matched neural-network experiment maps where subtracting exact nuclear repulsion makes an H2+ potential easier to fit. The advantage is large on a domain containing the repulsive wall and disappears as the domain moves beyond equilibrium.