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arXiv:2607.11580

Classical probabilistic realisation of quantum double-slit interference

Christof Wetterich

quant-phcond-mat.stat-mechhep-thSubmitted Jul 13, 2026• Announced Jul 14, 2026• 0 citations• Revised Aug 14, 2026 (v2)
v1 · Jul 13, 2026v2 · Aug 14, 2026v3 · Oct 20, 2026
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Abstract

We demonstrate how the interference effects for a quantum particle in the double-slit experiment can be described by classical probabilities. We investigate a classical field theory for a complex scalar field with probabilistic initial conditions. A central element are conserved charges leading to the concept of particles. These are statistical observables which describe properties of the probability distribution for field configurations. The conserved charges define subsystems for particle excitations of a vacuum state. The classical probability distribution for the one-particle subsystem can be expressed in terms of a complex wave function. The Liouville equation for the classical probability distribution implies that the time evolution of this wave function obeys the Schrödinger equation for a quantum particle in a potential. The potential arises from space-dependent external fields in the otherwise relativistic classical field theory. It can be chosen arbitrarily, realizing the typical quantum effects of interference, tunneling or discrete energy spectra.

Comments
Additional discussion of one-particle observables, 16 pages

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