Quantum Theatre uses the science of quantum mechanics to construct a rigorous framework for examining performance practice and the theatrical event, and live performance as a means of exploring the implications of quantum mechanics. Key ideas from physics are used to develop an interdisciplinary approach to writing about the work of a number of British theatre practitioners in terms of identity, observation and play. What this type of analysis does is enable an examination of aspects of performance that can remain hidden and so cast new light on the performance event.This is the first study of its kind that develops such a framework for analysis of contemporary performance, and provides a coherent alternative to postmodernism as a theoretical framework for writing about performance. As such, this book develops a methodology that can be applied to a wide range of performance practices. Furthermore, it presents an analysis of the work of a number of contemporary performance makers, including Vincent Dance Theatre and Triangle Theatre.