On primordial matter production induced by spatial curvature in the early universe
General Relativity and Quantum Cosmology
2026-04-14 v2 Quantum Physics
Abstract
In this note, it is shown that nonvanishing spatial curvature produces primordial matter in the initially empty universe due to quantum gravity effects. This matter decays faster than radiation and is described by a stiff equation of state. The quantum Hamiltonian constraint equation for the universe with the maximally symmetric geometry is solved in the semi-classical approximation. The extra energy density and pressure of quantum origin that appear in the generalized Friedmann equations describe primordial matter and modify the expansion history of the early universe.
Cite
@article{arxiv.2507.20775,
title = {On primordial matter production induced by spatial curvature in the early universe},
author = {V. E. Kuzmichev and V. V. Kuzmichev},
journal= {arXiv preprint arXiv:2507.20775},
year = {2026}
}
Comments
11 pages; v.2: the article has been substantially revised; significantly expanded the list of references; minor adjustments were made to the title