Albuquerque, Luiz C. de [UNESP]Cavalcanti, R. M.2014-05-202014-05-202002-02-15Physical Review D. College Pk: American Physical Soc, v. 65, n. 4, 10 p., 2002.0556-2821http://hdl.handle.net/11449/38473We compute the leading radiative correction to the Casimir force between two parallel plates in the lambdaPhi(4) theory. Dirichlet and periodic boundary conditions are considered. A heuristic approach, in which the Casimir energy is computed as the sum of one-loop corrected zero-point energies, is shown to yield incorrect results, but we show how to amend it. The technique is then used in the case of periodic boundary conditions to construct a perturbative expansion which is free of infrared singularities in the massless limit. In this case we also compute the next-to-leading order radiative correction, which turns out to be proportional to lambda(3/2).10engArtigo10.1103/PhysRevD.65.045004WOS:000174043800063Acesso abertoWOS000174043800063.pdf