2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199784A model of non-local dilaton interactions, motivated by string duality symmetries, is applied to a scenario of "coupled quintessence" in which the dilaton dark energy is non-locally coupled to the dark-matter sources. It is shown that the non-local effects tend to generate a backreaction which -- for strong enough coupling -- can automatically compensate the acceleration due to the negative pressure of the dilaton potential, thus asymptotically restoring the standard (dust-dominated) decelerated regime. This result is illustrated by analytical computations and numerical examples.11 pages, 1 figure epsGeneral Relativity and Quantum CosmologyAstrophysicsHigh Energy Physics - Theorytext