Abstract: The primitive ontology approach to quantum mechanics aims to construct a universal explanatory framework, enabling macroscopic entities and their behaviors in the 3D space to be explained based on the microscopic entities and their behaviors in the 3D space. Bohmian mechanics and the Random Discontinuous Motion of Particles (RDMP) are two primitive ontology theories of quantum mechanics. Bohmian mechanics posits its primitive ontology based on certain a priori principles and explains the wave function on this basis. In contrast, the RDMP theory, combining new empirical facts provided by protective measurements and the universally valid reality criteria in physics (the Ontological Model Framework), adopts a more general and rigorous methodological principle in exploring the ontology of quantum mechanics, emphasizing the correspondence between the formalism of physical theories, physical ontology, and human experience.

Key Words: Quantum realism; Primitive ontology approach; Bohmian mechanics; Theory of Random Discontinuous Motion of Particles; Ontological model framework

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