Models on Event Symmetric Space-Time

TL;DR

This paper explores an event symmetric approach to quantum gravity, proposing models where space-time's fundamental laws are invariant under event exchanges, allowing for dynamic topology and dimension changes.

Contribution

It introduces a discrete, event symmetric framework for quantum gravity, including superstring models based on discrete supergroups, emphasizing spontaneous symmetry breaking.

Findings

Event symmetric models allow topology and dimension changes.

Superstring models based on discrete supergroups are developed.

The approach challenges traditional assumptions of space-time continuity.

Abstract

In the event symmetric approach to quantum gravity it is assumed that the fundamental laws of physics must be invariant under exchange of any two space-time events. The fact that this symmetry if obviously not observed is attributed to the possibility of a spontaneous symmetry breaking mechanism in which the residual symmetry is diffeomorphism invariance on a continuum. The approach has a discrete nature while dimensionality, continuity of space-time and causality are abandoned as fundamental principles. Consequently space-time is a dynamical object which may undergo changes of topology or dimension. A number of different types of Event Symmetric model are described. The most interesting models are event symmetric superstring models based on discrete string supergroups.