2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105781It is possible to generate an accelerated period of expansion from reasonable potentials acting between the universe particle constituents. The pressure of primordial nucleons interacting via a simple nuclear potential is obtained via Mayer's cluster expansion technique. The attractive part of the potential engenders a negative pressure and may therefore be responsible for the cosmic acceleration.4 pages, 3 figures, 1 tableGeneral Relativity and Quantum Cosmologytext