Statistical complexity and Fisher–Shannon information measure of H+2

Using the simple Coulson molecular wave function for the ground state H + 2 molecule as a function of internuclear distance, the first molecular calculations of (a) the statistical complexity measure due to Lopez-Ruiz, Mancini, and Calbet and (b) the Fisher-Shannon information measure in the position and momentum spaces are reported. It is found that the two measures exhibit the molecular bonding in the form of a characteristic minimum around the equilibrium internuclear distance in the product space.

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