We study the quantum corrections on the Szekeres system in the context of
canonical quantization in the presence of symmetries. We start from an
effective point-like Lagrangian with two integrals of motion, one corresponding
to the Hamiltonian and the other to a second rank Killing tensor. Imposing
their quantum version on the wave function results to a solution which is then
interpreted in the context of Bohmian mechanics. In this semiclassical
approach, it is shown that there is no quantum corrections, thus the classical
trajectories of the Szekeres system are not affected at this level. Finally, we
define a probability function which shows that a stationary surface of the
probability corresponds to a classical exact solutionComment: 7 pages, 3 figures, typos corrected in section 3.2, to appear in
Classical and Quantum Gravit