Universe or Multiverse?

Abstract

Recent developments in cosmology and particle physics, such as the string landscape picture, have led to the remarkable realization that our universe—rather than being unique—could be just one of many universes. The multiverse proposal helps to explain the origin of the universe and some of its observational features. In this volume, a number of active and eminent researchers—mainly cosmologists and particle physicists but also some philosophers—address these issues and describe recent developments. The articles represent the full spectrum of views, providing an overview of the subject.