Horizon-Driven Expansion from Hawking-Like Radiation: A Curvature-Coupled Cosmological Model
Abstract
We propose a cosmological model in which the expansion of the universe is driven by a Hawking-like influx of energy across the cosmological horizon, rather than from a fixed cosmological constant. In place of a cosmological constant, we introduce source terms in the Friedmann and continuity equations that couple horizon curvature to matter and radiation densities. At high curvature (large Hubble parameter ), this influx strongly replenishes matter and radiation, slowing their adiabatic dilution. As curvature diminishes, the influx weakens, smoothly transitioning into standard radiation- or matter-dominated eras. This mechanism naturally suppresses spatial curvature without requiring an inflationary phase. It may also produce near-scale-invariant fluctuations via slowly varying horizon thermodynamics.
Cite
@article{arxiv.2504.20283,
title = {Horizon-Driven Expansion from Hawking-Like Radiation: A Curvature-Coupled Cosmological Model},
author = {Aman Singh},
journal= {arXiv preprint arXiv:2504.20283},
year = {2025}
}