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Fundamental Mathematical Structures of Quantum Theory: Spectral Theory, Foundational Issues, Symmetries, Algebraic Formulation

Valter Moretti

Published Jun 20, 2019• 0 citations
Publisher
DOI
10.1007/978-3-030-18346-2

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This paper collects and extends the lectures I gave at the “XXIV International Fall Workshop on Geometry and Physics” held in Zaragoza (Spain) during September 2015. Within these lectures I review the formulation of Quantum Mechanics, and quantum theories in general, from a mathematically advanced viewpoint, essentially based on the orthomodular lattice of elementary propositions, discussing some fundamental ideas, mathematical tools and theorems also related to the representation of physical symmetries. The final step consists of an elementary introduction the so-called ([Formula: see text]-) algebraic formulation of quantum theories.
This work develops the mathematical structure of Relational Retrocausal Quantum Mechanics (RRQM) beginning from its mother-state formulation. Rather than revisiting theinterpretational foundations established in earlier work, we investigate the consequences of treating the mother state as the fundamental object of the theory within a rigged Hilbert space. Starting from the global spectral state, we construct the operator formalism governing spectral evolution and introduce the invariant mass operator as a derived observable actingon the mother state. This naturally leads to an operator formulation of mass expectation values and higher moments, providing a framework in which quantities traditionally regardedas fixed particle parameters emerge from the spectral properties of the underlying state.Building upon this formalism, we investigate the extension of the theory to spinorial wavefunctions, the structure of multiparticle realizations, spectral radiation reaction, and the role of conditional nuclear realizations in observable quantities. We further examine generalized derivative operators and show that their algebra naturally separates into symmetric and antisymmetric sectors, suggesting a possible geometric interpretation of gravitywithin the spectral framework.