Barandes, Jacob A. (2025) A Deflationary Account of Quantum Theory and its Implications for the Complex Numbers. [Preprint]
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Abstract
Why does quantum theory need the complex numbers? With a view toward answering this question, this paper argues that the usual Hilbert-space formalism is a special case of the general method of Markovian embeddings. This paper then describes the ‘indivisible interpretation’ of quantum theory, according to which a quantum system can be regarded as an ‘indivisible’ stochastic process unfolding in an old-fashioned configuration space, with wave functions and other exotic Hilbert-space ingredients demoted from having an ontological status. The complex numbers end up being necessary to ensure that the Hilbert-space formalism is indeed a Markovian embedding.
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