Quantum theory and Einstein's theory of relativity are at the centre of modern theoretical physics, yet, the consistent unification of both theories is still el

Quantum gravity is perhaps the most important open problem in fundamental physics. It is the problem of merging quantum mechanics and general relativity, the tw

This book describes a paradigm change in modern physics from the philosophy and mathematical expression of the quantum theory to those of general relativity. Th

Leading theorists share their important insights into the ongoing quest of theoretical physics to find a quantum theory of gravity.

"It would be hard to imagine a better guide to this difficult subject." -- Scientific American In Three Roads to Quantum Gravity, Lee Smolin provides an accessi