2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16064A giant level shift, resulted from the interaction of an electron in a spherical quantum dot with zero--point oscillations of confined modes of the electric field, is divulged. The energy correction depends on the dot radius. This size scaling of the depolarisation effect is computed semiclassically. A change of the optical properties of the matrix surrounding the dot provides a method to study the shift experimentally.6 pages, 2 postscript figures (minor style correction made on 28.02.2000)Materials ScienceMesoscale and Nanoscale Physicstext