Bonn 2025 – wissenschaftliches Programm
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AGPhil: Arbeitsgruppe Philosophie der Physik
AGPhil 10: Foundations of Quantum Mechanics II
AGPhil 10.3: Vortrag
Donnerstag, 13. März 2025, 18:00–18:30, HS XVII
Natural Spacetime: Describing Nature in Natural Concepts — •Markolf Niemz — Heidelberg University, Germany
Today’s physics describes nature in “empirical concepts” (based on observation), such as coordinate space/time, wave/particle, force/field. There are coordinate-free formulations of special and general relativity (SR/GR), but there is no absolute time in SR/GR and thus no “holistic view” (universal for all objects and at the same instant in time). I
show: Euclidean relativity (ER) provides a holistic view by describing nature in “natural concepts” (immanent in all objects). “Pure distance” (proper space/time) replaces coordinate space/time. Pure energy replaces wave/particle. Process is a promising concept to replace force/field. Any object’s proper space d1, d2, d3 and its proper time τ span a natural, Euclidean spacetime (ES) d1, d2, d3, d4, where d4=cτ. For each object, there is a relative 4D vector “flow of proper time” τ. The new invariant is absolute, cosmic time θ. All energy moves through ES at the speed c. An observer’s view is created by orthogonally projecting ES to his proper space and to his proper time. Information is lost in projections giving rise to mysteries. ER explains the 10% deviation in the published values of H0, and it declares dark energy and non-locality obsolete. I conclude: (1) Information hidden in the 4D vector τ solves 15 mysteries. (2) An acceleration rotates τ and curves an object’s worldline in flat ES. (3) ER complements SR/GR. We must apply ER if there are significantly different 4D vectors τ and τ ′, as in high-redshift supernovae or entanglement. We must apply SR/GR if we use empirical concepts (www.preprints.org/manuscript/202207.0399).
Keywords: spacetime; cosmology; Hubble tension; dark energy; quantum mechanics