A French view of London

In 1939 London and Bauer published a 'little book' that shaped the debate over the role of consciousness in resolving the measurement problem in quantum mechanics. Mistakenly understood as merely summarising von Neumann's account, both sides in the debate failed to appreciate its phenomenological underpinnings. London not only originally studied phenomenology but continued thinking about and discussing this approach in the years leading up to the publication of his work with Bauer, most notably with Gurwitsch, who likewise had a dual background in phenomenological philosophy and physics. In the book, A Phenomenological Approach to Quantum Mechanics: Cutting the Chain of Correlations (French, 2023), the historical background to London and Bauer's work is set out prior to situating it within the context of Husserl's philosophy as a whole. It is concluded that the London and Bauer phenomenological account offers a potentially fruitful way forward through various dichotomies, such as that between psi-ontic and psi-epistemic accounts and between interpretational and reconstructive approaches more generally, as well as with regard to understanding quantum physics more generally. In this paper London and Bauer's insistence that quantum mechanics should be seen as a theory of knowledge in its own right is emphasized, where this must be taken as phenomenologically grounded. Hopefully this work will be viewed as contributing to a revised phenomenological understanding of modern physics, standing alongside Ryckman's The Reign of Relativity (Ryckman, 2005) and Berghofer and Wiltsche's edited collection Phenomenological Approaches to Physics (Berghofer & Wiltsche, 2020).