Contexts, Systems and Modalities : a new ontology for Quantum Mechanics (Orale)

Alexia Auffèves, Philippe Grangier

Philippe Grangier

Newton C. A. da Costa, Olímpia Lombardi, Mariano Lastiri

Philippe Grangier

This note presents a concise and non-polemical comparison of several major interpretations of quantum mechanics, with a particular emphasis on the distinction between FAPP-solutions ("For All Practical Purposes'') versus ontological solutions to the measurement problem. Building on this distinction, we argue that the Contexts-Systems-Modalities (CSM) framework, supplemented by the operator-algebraic description of macroscopic contexts, provides a conceptually complete, non-FAPP ontology that naturally incorporates irreversibility and the physical structure of measurement devices. This approach differs significantly from other ontological interpretations such as Bohmian mechanics, spontaneous collapse, or many-worlds, and highlights the major role of contextual quantization in shaping quantum theory.

Philippe Grangier

Shan Gao