2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116256The nonlocal property of quantum mechanics can be nicely tested in high energy physics; in particular, the neutral kaon pairs as produced at DA$Φ$NE, Frascati, are very well suited. The analogies of kaons as compared to polarized photons or spin--1/2 particles --the kaonic qubit feature-- are reviewed. However, there are also fundamental differences which occur due to the kaon time evolution and due to internal symmetries; in particular, the violation of CP symmetry is related to the violation of Bell inequalities. Two type of Bell inequalities for kaons are presented, one for the variation of the ``quasi--spin'' and the other for different detection times of the kaon.21 pages, 2 figures, Lectures given at: Workshop on Neutral Kaon Interferometry at the Phi--factory, Frascati, March 24th, 2006High Energy Physics - PhenomenologyQuantum Physicstext