The Computing Spacetime

TL;DR

This paper explores the concept of the universe as a quantum computer, discussing quantum gravity and introducing Quantum Graphity as a model for dynamical spacetime in quantum computation terms.

Contribution

It provides an accessible overview of the universe as a quantum computation and introduces Quantum Graphity models for dynamical spacetime.

Findings

Quantum Graphity models spacetime as a quantum computation

Offers a unified perspective on physics and quantum gravity

Facilitates understanding of quantum gravity problems

Abstract

The idea that the Universe is a program in a giant quantum computer is both fascinating and suffers from various problems. Nonetheless, it can provide a unified picture of physics and this can be very useful for the problem of Quantum Gravity where such a unification is necessary. In previous work we proposed Quantum Graphity, a simple way to model a dynamical spacetime as a quantum computation. In this paper, we give an easily readable introduction to the idea of the universe as a quantum computation, the problem of quantum gravity, and the graphity models.