2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35674We show that particle production during the expansion of bubbles of true vacuum in the sea of false vacuum is possible and calculate the resulting rate. As a result the nucleated bubbles cannot expand due to the transfer of false vacuum energy to the created particles inside the bubbles. Therefore all the inflationary models dealing with the nucleation and expansion of the bubbles (including extended inflation) may not be viable.8 pages, latex, no figuresGeneral Relativity and Quantum CosmologyAstrophysicsHigh Energy Physics - Theorytext