2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52320We compute the first radiative correction to the Casimir energy in the $(d+1)$-dimensional $λ|ϕ|^{4}$ model submitted to quasi-periodic boundary conditions in one spatial direction. Our results agree with the ones found in the literature for periodic and anti-periodic boundary conditions, special cases of the quasi-periodic boundary conditions.6 pages, 2 figures. Work presented at the XXIV Brazilian National Meeting on Particles and Fields (Caxambu, Brazil, 30 Sep - 4 Oct 2003)High Energy Physics - Theorytext