Introduction

Abstract

Over the last three decades physics has taken on an increasingly information-theoretic flavour. This has led to a quantum theory of information which promises computers with unprecedented power and unconditionally secure cryptography, and perhaps most importantly, has offered us a new perspective on quantum theory itself. The aim of this thesis is to use the large toolbox of quantum information theory to study problems whose solution requires both quantum mechanics and relativity, with the hope that these investigations may offer unexpected and intriguing results about possible features of quantum gravity. This thesis is broken into three distinct parts, each of which is briefly summarized in this chapter.