An effective model of the spacetime foam

TL;DR

This paper proposes an approximate 5D wormhole-based model of spacetime foam using spinor fields, suggesting supergravity theories as effective descriptions, and explores the foam's topological and electromagnetic properties.

Contribution

It introduces a novel 5D wormhole model with spinor fields to describe spacetime foam and links supergravity theories to this effective modeling approach.

Findings

Wormholes can prevent naked singularity formation when e > m.

Spacetime foam can be modeled as a dielectric with quantum handles as dipoles.

Supergravity theories with nonminimal spinor-electromagnetic interactions can describe spacetime foam.

Abstract

An approximate model of the spacetime foam is offered in which each quantum handle (wormhole) is a 5D wormhole-like solution. A spinor field is introduced for an effective description of this foam. The topological handles of the spacetime foam can be attached either to one space or connect two different spaces. In the first case we have a wormhole with the quantum throat and such object can demonstrate a model of preventing the formation the naked singularity with relation $e > m$. In the second case the spacetime foam looks as a dielectric with quantum handles as dipoles. It is supposed that supergravity theories with a nonminimal interaction between spinor and electromagnetic fields can be considered as an effective model approximately describing the spacetime foam.