Quantum Gravity Simulation and Irreversibility in Nonlinear Optics

We show that non-paraxial nonlinear optics can be described in terms of a generalized quantum mechanics that is nowadays studied in the field of quantum gravity. The key point is the so-called generalized uncertainty principle (GUP) that describes particle localization on a scale comparable with the Planck length. The GUP has one-to-one correspondence to the resolution limit of non-paraxial propagation.