String Cosmology and the Dimension of Spacetime

TL;DR

This paper explores how string theory and cosmological models can explain why our universe has three large spatial dimensions, proposing a new approach based on random walks and computer simulations.

Contribution

It introduces a novel string cosmology model using random walks to explain the emergence of three large spatial dimensions, differing from previous theories.

Findings

A four-dimensional spacetime can result from specific initial conditions.

The model supports the plausibility of three large spatial dimensions in string cosmology.

Computer simulations validate the new approach.

Abstract

The implications of string theory for understanding the dimension of uncompactified spacetime are investigated. Using recent ideas in string cosmology, a new model is proposed to explain why three spatial dimensions grew large. Unlike the original work of Brandenberger and Vafa, this paradigm uses the theory of random walks. A computer model is developed to test the implications of this new approach. It is found that a four-dimensional spacetime can be explained by the proper choice of initial conditions.