CONTEXT The spin of a particle is physically manifest in multiple phenomena. For quantum mechanics (QM), spin is an intrinsic property of a point particle, but an ontological explanation is lacking. In this paper we propose a physical explanation for spin at the sub-particle level, using a non-local hidden-variable (NLHV) theory. APPROACH Mechanisms for spin were inferred from the Cordus NLHV theory, specifically from theorised structures at the sub-particle level. RESULTS Physical geometry of the particle can explain spin phenomena: polarisation, Pauli exclusion principle (Einstein-Podolsky-Rosen paradox), excited states, and selective spin of neutrino species. A quantitative derivation is provided for electron spin g-factor g = 2, and a qualitative explanation for the anomalous component. IMPLICATIONS NLHV theory offers a candidate route to new physics at the sub-particle level. This also implies philosophically that physical realism may apply to physics at the deeper level below QM. ORIGINALITY The electron g-factor has been derived using sub-particle structures in NLHV theory, without using quantum theory. This is significant as the g-factor is otherwise considered uniquely predicted by QM. Explanations are provided for spin phenomena in terms of physical sub-structures to the particle.
CONTEXT The spin of a particle is physically manifest in multiple phenomena. For quantum mechanics (QM), spin is an intrinsic property of a point particle, but an ontological explanation is lacking. In this paper we propose a physical explanation for spin at the sub-particle level, using a non-local hidden-variable (NLHV) theory. APPROACH Mechanisms for spin were inferred from the Cordus NLHV theory, specifically from theorised structures at the sub-particle level. RESULTS Physical geometry of the particle can explain spin phenomena: polarisation, Pauli exclusion principle (Einstein-Podolsky-Rosen paradox), excited states, and selective spin of neutrino species. A quantitative derivation is provided for electron spin g-factor g = 2, and a qualitative explanation for the anomalous component. IMPLICATIONS NLHV theory offers a candidate route to new physics at the sub-particle level. This also implies philosophically that physical realism may apply to physics at the deeper level below QM. ORIGINALITY The electron g-factor has been derived using sub-particle structures in NLHV theory, without using quantum theory. This is significant as the g-factor is otherwise considered uniquely predicted by QM. Explanations are provided for spin phenomena in terms of physical sub-structures to the particle.
Problem: Superposition and entanglement are coherent effects, which can be quantified by quantum mechanics (QM), but lack descriptive explanations. They are typically analysed with inequality methods, and the results favour QM and reject physical realism and hidden-variable solutions. In particular, Colbeck & Renner (2011) showed that no extension of quantum theory can exist with better predictive power than quantum mechanics itself. Purpose: The purpose here is to critically evaluate from a conceptual and philosophical perspective the ontological underpinnings of the inequality approach. The current work is speculative in nature as it is based on a conjectured non-local hidden-variable (NLHV) design for particles, and does not yet have a mathematical formalism. Nonetheless this is worth attempting for the philosophical questions it poses about the nature of reality, and the pointers it gives to possible future directions in fundamental physics. Findings: The premises of the C & R proof (that particles are points, that locality exists, that quantum theory is correct) are inconsistent, hence invalidate its conclusion. We also show that superposition and entanglement may be qualitatively explained if particles were to have the internal structure proposed by the Cordus NLHV theory. Originality: The ability to explain superposition and entanglement conceptually in terms of physical realism is relevant because it rebuts the claim that it is impossible that such a hidden-variable theory could exist. This is significant because previously it has been believed that these phenomena are explainable by QM only.
PROBLEM- There are many integration problems of fundamental physics that still lack ontologically coherent solutions. NEED- There is a need to find a new theory of physics with wide-ranging logical consistency. The idea that particles could have internal structure has long been a consideration in the development of theories of physics, as evidenced in the EPR criticism (Einstein, Podolsky, & Rosen, 1935). DIFFICULTY- However Local hidden-variable solutions are excluded by the Bell-type inequalities and by the empirical evidence of entanglement. The non-local hidden-variable (NLHV) sector is not entirely excluded on theoretical grounds. However, if any solution existed it would have to be counterintuitive as all the obvious candidates have been excluded [4]. Unfortunately the hidden-variable sector has proved incapable of offering suitable solutions. APPROACH- Conceptual design methods were borrowed from engineering design and applied to create an initial conjectural solution for the double-slit device. This was then validated against multiple other phenomena. RESULTS- This paper offers a candidate solution, in the form of a new theory of physics wherein particles have internal structures. This Cordus theory proposes a specific structure for particles, for both the structure internal to the particle and the nature of the external discrete field emissions. FINDINGS- It also has good external construct validity, as it: explains path dilemmas in interferometers; recovers basic laws of optics from first principles (reflection, refraction, Brewster’s angle); identifies the causes of contextual measurement; explains the transition from coherence to discoherence; explains pair-production and annihilation; offers a solution to the asymmetrical baryogenesis and leptogenesis problems; explains time dilation; conceptually unifies the electro-magneto-gravitational forces with the strong interaction; explains the selective spin attributes of the neutrino species; predicts the internal structure of the atomic nucleus and explains the stability, instability and non-existence of the table of nuclides from Hydrogen to Neon. ORGINALITY- The Cordus theory is a novel conceptual framework for fundamental physics. It shows that a specific structure of particles has excellent explanatory power for many phenomena. The strengths of the theory are: Explanatory (ontological) power; Coherent solution across multiple phenomena; Offers candidate solutions to otherwise intractable problems. IMPLICATIONS- The Bell-type inequalities are falsified. Physical realism is re-asserted. The stochastic nature of the wave-function is subsumed in a deeper explanation. The theory is not inimical to quantum mechanics, which it reinterprets as a stochastic approximation of a deeper determinism. The new theory has philosophical implications because it shows that it is possible to conceive of a solution for fundamental physics that is grounded in physical realism. The theory therefore rebuts the idea that the deeper level of physics is purely mathematical, and it rejects the many-worlds interpretation.
Spin is an intrinsic form of angular momentum carried by elementary particles, composite particles, and atomic nuclei. It is wildly believed that spin is a purely quantum mechanical concept and has no classical analogue. In fact, elementary particles are conceived as point objects which have no axis to “spin” around. Therefore, there is no explaining how spin arises at the fundamental level, why particles have the values they do, and what underpins the Pauli Exclusion principle and Bose-Einstein behavior. However, spin is like a vector quantity; it has a definite magnitude, and it has a “direction”, in order to spin should be composite. In this paper we propose a physical explanation for spin of the electron at the sub-particle level, relying on the vortex model of the electron. The electron is described as a superfluid frictionless vortex which has a mass, angular momentum and spin to provide a complete explanation of all properties of the electron: it composite, spinning around its own axis, produces a tiny magnetic fields independent of those from its orbital motions. The classical hydrodynamic laws are used to describe the quantum properties of the electron, such as spin, angular momentum, magnetic momentum and a magnetic dipole. The circulation in the vortex is constant, and the angular momentum of the vortex is conserved and has the same value of Planck constant. The direction of the angular momentum of a spinning electron vortex is along the axis of rotation and determined by the direction of spin. The spin quantum number 1/2 has a fixed value which represents the gap between the circulation rate of the core of the vortex and the boundaries of the vortex. The changeable values +1/2 “spin-up” or -1/2 “spin-down” indicate the direction of the magnetic dipole of the vortex. The relation between spin and Planck constant is discussed and the origin h/4pi angular momentum units are revealed.
From the invariance properties of the Schrodinger equation and the isotropy of space we show that a generic (non-relativistic) quantum system is endowed with an ``external'' motion, which can be interpreted as the motion of the centre of mass, and an ``internal'' one, whose presence disappears in the classical limit. The latter is caused by the spin of the particle, whatever is its actual value (different from zero). The quantum potential in the Schrodinger equation, which is responsible of the quantum effects of the system, is then completely determined from the properties of the internal motion, and its ``unusual'' properties have a simple and physical explanation in the present context. From the impossibility to fix the initial conditions relevant for the internal motion follows, finally, the need of a probabilistic interpretation of quantum mechanics.
Summary: Quantum spin as a structural signature of informational stabilization under observer-relative exclusion. This pre-print proposes an alternative ontological reading of quantum spin grounded in an informational framework. Spin is not treated as an intrinsic property of particles, but as the observable signature of how information stabilizes through phase-dependent exclusion relative to an observer. Within this framework, different spin values correspond to different depths of informational validation, rather than to distinct physical substances. Description:Rather than postulating spin as an intrinsic internal degree of freedom, the paper interprets spin as the residual trace of how information becomes stable under observer-relative phase inversion and exclusion. The central claim is that stabilization of information does not occur through accumulation alone, but through structured exclusion of incompatible alternatives under phase displacement. When an informational configuration must remain coherent not only under its own inversion, but also under inversion relative to the observer’s evolving informational trajectory, a double-valued closure becomes unavoidable. This structural requirement directly corresponds to the emergence of spin-1/2 behavior. Within this framework: Spin-0 corresponds to the reading of pure informational presence, prior to orientation or relational interpretation Spin-1 corresponds to first-order relational reading, encoding directional propagation and hierarchical ordering between informational events Spin-1/2 emerges when stabilization requires double exclusion involving the observer, producing an irreducible phase-dependent validation Spin-2 corresponds to the level at which informational density constrains the framework of future interactions, providing an informational interpretation of gravitation The paper shows that once information is discrete, observer-relative, and stabilized through exclusion under phase displacement, SU(2)-like double-valued structures are not optional but structurally necessary. Spin therefore appears as a level-dependent reading of the same informational substrate, determined by how stabilization is achieved, rather than as a hidden intrinsic attribute of matter. This work does not propose a new formalism or modification of quantum mechanics. It is an interpretive framework compatible with existing formalisms, aimed at clarifying the ontological meaning of spin and its necessity. It connects phase, oscillation, decoherence, and observer dependence within a single structural mechanism, extending the stabilization logic introduced in the companion paper on the NNO operator. Relation to other work This article builds directly on: The Universal Theory of Information (TUI): Emergence of Physics from Informational Dynamics (https://doi.org/10.5281/zenodo.15106945) The NNO operator: Double Negation and Oscillation as Informational Conditions for the Stabilization of Observed Reality (https://doi.org/10.5281/zenodo.18443043) It can be read independently, but reaches its full coherence when considered as part of the TUI–NNO–SPIN conceptual sequence. About the author Mathieu Valentin Rondet is an independent researcher with a dual background in science and digital systems. He holds two master’s degrees in molecular and developmental biology, genetics and biochemistry (earned in France and the U.S.) and has spent over two decades designing physical simulations, procedural dynamics, and interactive systems for virtual environments. His approach blends biological information studies, structural logic, and information-based modeling to explore new perspectives on fundamental physics and observer-relative reality,
Problem: The Fresnel equations describe the proportions of reflected and transmitted light from a surface, and are conventionally derived from wave theory continuum mechanics. Particle-based derivations of the Fresnel equations appear not to exist. Approach: The objective of this work was to derive the basic optical laws from first principles from a particle basis. The particle model used was the Cordus theory, a type of non-local hidden-variable (NLHV) theory that predicts specific substructures to the photon and other particles. Findings: The theory explains the origin of the orthogonal electrostatic and magnetic fields, and re-derives the refraction and reflection laws including Snell’s law and critical angle, and the Fresnel equations for s and p-polarisation. These formulations are identical to those produced by electromagnetic wave theory. Contribution: The work provides a comprehensive derivation and physical explanation of the basic optical laws, which appears not to have previously been shown from a particle basis. Implications: The primary implications are for suggesting routes for the theoretical advancement of fundamental physics. The Cordus NLHV particle theory explains optical phenomena, yet it also explains other physical phenomena including some otherwise only accessible through quantum mechanics (such as the electron spin g-factor) and general relativity (including the Lorentz and relativistic Doppler). It also provides solutions for phenomena of unknown causation, such as asymmetrical baryogenesis, unification of the interactions, and reasons for nuclide stability/instability. Consequently, the implication is that NLHV theories have the potential to represent a deeper physics that may underpin and unify quantum mechanics, general relativity, and wave theory.