2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/206636Considering that gravitational force might deviate from Newton's inverse-square law and become much stronger in small scale, we present a method to detect the possible existence of extra dimensions in the ADD model. By making use of an effective variational wave function, we obtain the nonrelativistic ground energy of a helium atom and its isoelectronic sequence. Based on these results, we calculate gravity correction of the ADD model. Our calculation may provide a rough estimation about the magnitude of the corresponding frequencies which could be measured in later experiments.8 pages, no figures, accepted by Mod. Phys. Lett. AHigh Energy Physics - Theorytext