Various Facets of Spacetime Foam

TL;DR

This paper explores the multifaceted nature of spacetime foam, linking it to fundamental physics, cosmology, and astrophysics, including dark energy, dark matter, and galactic dynamics, proposing it as a unifying concept.

Contribution

It offers a comprehensive overview of spacetime foam's roles across various physical phenomena, highlighting its potential to unify cosmological and astrophysical observations.

Findings

Spacetime foam may explain the critical energy density of the universe.

It provides insights into the origin of dark energy and dark matter.

It connects spacetime foam physics to galactic rotation curves and the Tully-Fisher relation.

Abstract

Spacetime foam manifests itself in a variety of ways. It has some attributes of a turbulent fluid. It is the source of the holographic principle. Cosmologically it may play a role in explaining why the energy density has the critical value, why dark energy/matter exists, and why the effective dynamical cosmological constant has the value as observed. Astrophysically the physics of spacetime foam helps to elucidate why the critical acceleration in modified Newtonian dynamics has the observed value; and it provides a possible connection between global physics and local galactic dynamics involving the phenomenon of flat rotation curves of galaxies and the observed Tully-Fisher relation. Spacetime foam physics also sheds light on nonlocal gravitational dynamics.