2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17177We present a simple method to deal with caustics in the semiclassical approximation to the partition function of a one-dimensional quantum system. The procedure, which makes use of complex trajectories, is applied to the quartic double-well potential.5 pages, 1 figure, Latex. Contribution to the Proceedings of the XXI Brazilian National Meeting on Particles and Fields (Sao Lourenco, October 23-27, 2000)Statistical MechanicsHigh Energy Physics - TheoryQuantum Physicstext