2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50609When a potential for a scalar field has two local minima, there arises structure of spherical shells due to gravitational interactions.3 pages, 1 figure. Proceeding for the YITP workshop "Fundamental Problems and Applications in Quantum Field Theory", Kyoto, Dec 20 - 22, 2000High Energy Physics - TheoryGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext