2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199616We shortly summarize the quantum field theory formalism for the neutrino mixing and report on recent results showing that the vacuum condensate induced by neutrino mixing can be interpreted as a dark energy component of the Universe.5 pages. Presented at Roma International Conference on Astro-Particle physics (RICAP'07), Roma, Italy, 20 - 22 June 2007High Energy Physics - Theorytext