2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91003Bohmian trajectories on the toroidal surface T^2 are determined from eigenfunctions of the Schrodinger equation. An expression for the monodromy matrix M(t) on a curved surface is developed and eigenvalues of M(t) on T^2 calculated. Lyapunov exponents for trajectories on T^2 are found for some trajectories to be of order unity.10 pages, 7 figures, submitted to Phys. Lett. AQuantum Physicstext