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LFM-PAPER-055: Double-Slit Experiment from Substrate Dynamics

Greg Partin

Published Feb 4, 2026• 0 citations
Publisher

Abstract

Description: The double-slit experiment—often called "the only mystery" of quantum mechanics—finds a straightforward resolution in the Lattice Field Medium (LFM) framework. When individual particles pass through two slits and produce an interference pattern, standard quantum mechanics invokes wave function collapse and the measurement problem. In LFM, there is no mystery: the "particle" IS a wave packet in the substrate, and waves naturally diffract and interfere. Using full GOV-01 + GOV-02 coupled dynamics, we demonstrate: A single E pulse propagates toward a χ barrier with two slits The pulse diffracts through both slits simultaneously Interference fringes appear on the detection screen Blocking one slit destroys the interference pattern The same equations that produce gravity (χ wells), dark matter (χ memory), atoms (bound E states), and molecules (overlapping χ wells) also produce wave-particle duality—which is simply wave dynamics. No collapse, no observer effect, no mystery.

DOI
10.5281/zenodo.18487331

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Description: The double-slit experiment—often called "the only mystery" of quantum mechanics—finds a straightforward resolution in the Lattice Field Medium (LFM) framework. When individual particles pass through two slits and produce an interference pattern, standard quantum mechanics invokes wave function collapse and the measurement problem. In LFM, there is no mystery: the "particle" IS a wave packet in the substrate, and waves naturally diffract and interfere. Using full GOV-01 + GOV-02 coupled dynamics, we demonstrate: A single E pulse propagates toward a χ barrier with two slits The pulse diffracts through both slits simultaneously Interference fringes appear on the detection screen Blocking one slit destroys the interference pattern The same equations that produce gravity (χ wells), dark matter (χ memory), atoms (bound E states), and molecules (overlapping χ wells) also produce wave-particle duality—which is simply wave dynamics. No collapse, no observer effect, no mystery.
The double-slit experiment has stood for a century as the paradigmatic demonstration of quantum superposition: the standard interpretation holds that a particle passes through both slits simultaneously, existing in a superposition of two spatially separated states. This paper proposes a physically distinct alternative: the particle's matter wave — a real physical wave propagating through space in accordance with de Broglie's relation λ = h/p — passes through both slits, while the particle itself (matter) remains in an undetermined state until a constructive interference maximum is formed at the detection screen. The particle does not simultaneously occupy two locations; the wave does. This distinction eliminates the need for superposition as an ontological commitment while fully reproducing the observed interference pattern. We further show that the disappearance of the interference pattern upon which-path measurement is explained without invoking wavefunction collapse: the measurement interaction redirects the matter wave to a single-slit geometry, eliminating the two-wave interference condition. Three experimentally testable predictions distinguish this framework from the standard interpretation: (1) weak-measurement trajectory reconstruction should reveal single particle paths inconsistent with simultaneous two-slit passage; (2) diffraction fringe spacing should depend on the mass density of the slit material, because denser slit edges generate a steeper refractive-index gradient for the matter wave; (3) the fringe pattern should exhibit a density-dependent phase shift measurable with current matter-wave interferometry technology. This reinterpretation requires no new mathematical formalism — the Schrödinger equation and Born's rule are retained — but replaces the ontological claim of simultaneous multi-location existence with the physically consistent picture of matter-wave propagation through an undetermined-state particle.
Young’s double slit experiments revived the wave theory of light. The standard interpretation is that the light behaves as waves before and after passing through the double slit. Feynman called the double slit experiment the only mystery in quantum mechanics. In this article, we experimentally show the novel universal phenomena: (1) each of the fringes of the interference patterns are produced independently and partially; (2) within macro-distance from a diaphragm, the light rays behave as photons and produces a non-interference pattern; while near the screen, the photons produce an orthogonal interference pattern; (3) The non-interference pattern evolves to the orthogonal interference pattern gradually in the same experiment; (4) The non-interference patterns and the orthogonal interference patterns can show on the screen simultaneously; (5) The convex lens stops the further evolution. The experiments: (1) challenge the wave theories of light; (2) violate both Bohr’s complementarity principle and wave particle duality; (3) provide profound phenomena for developing optics and for studying the nature of light; (4) suggest that a complete theory should be able to consistently interpret all phenomena, including the non-interference pattern, the interference pattern, and the evolution from the non-interference to the interference pattern in the same experiment.
Young’s double slit experiments revived the wave theory of light. The standard interpretation is that the light behaves as waves before and after passing through the double slit, and the superposition of waves produces the interference pattern. Feynman called the double slit experiment the only mystery in quantum mechanics. In this article, we experimentally show the novel universal phenomena: (1) within macro-distance from the diaphragm, the light rays behave as photons and produce non-interference patterns; while near the screen, the photons produce interference patterns; (2) The non-interference patterns evolve to the interference patterns gradually in the same classical wave experiment; (3) the light is photons before and after passing through the double slit; (4) The convex lens stops the further evolution. The experiments: (1) challenge the wave theories of the light; (2) violate both Bohr’s complementarity principle and wave particle duality; (3) provide profound phenomena for developing optics and for studying the nature of light; (4) suggest that a complete theory should be able to consistently interpret all phenomena, including the non-interference pattern, the interference pattern, and the evolution from the non-interference to the interference pattern in the wave experiment; (5) show a new mystery that photons, as particles, distribute as waves.
Young’s double slit experiments revived the wave theory of light. The standard interpretation is that the light behaves as waves before and after passing through the double slit, and the superposition of waves produces the interference pattern. Feynman called the double slit experiment the only mystery in quantum mechanics. In this article, we experimentally show the novel universal phenomena: (1) the light is particles, but waves: within macro-distance from a diaphragm, the light rays produce non-interference patterns; while near the screen, the photons produce orthogonal interference patterns; (2) the non-interference patterns evolve to the orthogonal interference patterns gradually in the same experiment; (3) the evolution of the patterns cannot be interpreted by either classic optics or the quantum optics; (4) the non-interference patterns and the orthogonal interference patterns can show on the screen simultaneously; (5) The convex lens stops the further evolution. The experiments: (1) challenge the classical optics and quantum optics; (2) violate both Bohr’s complementarity principle and wave particle duality; (3) provide profound phenomena for developing optics and for studying the nature of light; (4) suggest that a complete theory should be able to consistently interpret all phenomena, including the non-interference pattern, the interference pattern, and the evolution from the non-interference to the interference pattern in the same wave experiment.
The double-slit interference experiment remains one of the most puzzling phenomena in quantum mechanics. Standard quantum mechanics explains it through wave-particle duality, superposition, and wavefunction collapse—all mathematical postulates without physical mechanisms. Within the Huaxia Spacetime Total Conservation Theory (H-SET), the electron is not a point particle but a helical dislocation loop in the space medium with spatial extension determined by the space quantum coherence scale. Interference arises because the elastic field of a single electron loop simultaneously covers both slits, and the two emergent elastic waves interfere on the screen. The effective de Broglie wavelength is derived as the geometric extension of the dislocation loop in the momentum direction, yielding identical numerical values to standard quantum mechanics but with a physical origin. Observation-induced disappearance of interference is explained as the destruction of elastic boundary conditions at the slits by the macroscopic elastic field of the detector, not by mysterious wavefunction collapse. Three testable predictions are provided: precise fringe spacing for fullerene (C₆₀) interference, the quantitative relationship between path distinguishability and fringe visibility, and the mass limit for macromolecular interference.
Abstract Chapter 11 introduces the essential mystery of quantum mechanics, shows how it is resolved, and then goes on to examine related phenomena. The mystery is how individual photons, not electromagnetic waves, can give rise to the interference pattern seen in the two-slit experiment. They are shown to do so because the relevant quantum amplitude is a linear combination of two terms, leading to the pattern when neither slit is identified as the one the photon went through, but collapsing to one term and no pattern if the slit is identified. Similar results are shown to occur when individual electrons are incident on the two slits, and when large molecules, which have de Broglie wavelengths, are scattered by diffraction gratings. Many other interference experiments are described, including those where a photon was shown to be in two places simultaneously and one where a photon displayed both wave and particle features.