2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15353It is demonstrated that any realistic model of quintessence should be based on Supergravity since, when the scalar field is on tracks today, $Q\approx m_{\rm Pl}$. This improves the agreement between theoretical predictions and the current observations. In particular, a generic property is that ratio $ω_{\rm Q}\equiv p_{\rm Q}/ρ_{\rm Q}$ is pushed towards -1. A string-inspired model is proposed where the potential is given by $V(Q)= \frac{Λ^{4+α}}{Q^α}e^{\fracκ{2}Q^2}$. The model predicts $ω_{\rm Q}\approx -0.82$, a value less that one sigma from the current likehood value.4 pages, 2 figures, presented at the Journees Relativistes 99, Weimar, September 12-17, 1999AstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext