Quantum Space: Loop Quantum Gravity and the Search for the Structure of Space, Time, and the Universe

This book combines quantum theory and general relativity to explain the new quantum theory of space and time. It discusses the road less travelled, which takes relativity as its starting point and leads to Loop Quantum Gravity.

Format: Paperback / softback
Length: 448 pages
Publication date: 24 March 2022
Publisher: Oxford University Press

This book is a groundbreaking exploration of the new quantum theory of space and time, combining detailed discussions of both quantum theory and general relativity. It stands as one of the earliest attempts to unravel the complexities of this revolutionary theory. In the realm of physics, we are fortunate to have two remarkable theories that have achieved immense success. The first is Albert Einstein's general theory of relativity, which provides a comprehensive description of the large-scale behavior of matter within a curved spacetime. This theory serves as the foundation for the widely accepted standard model of big bang cosmology. Recent groundbreaking discoveries, such as the detection of gravitational waves at the LIGO observatory in the United States and subsequently at Virgo in Italy, further validate the profound insights and predictive power of this theory.

The second is quantum mechanics, which delves into the properties and behavior of matter and radiation at the smallest scales. It forms the basis for the standard model of particle physics, which intricately constructs the entire visible universe by assembling collections of quarks, electrons, and force-carrying particles, including photons. The recent discovery of the Higgs boson at CERN in Geneva is just one of the many triumphs attributed to this theory.

While these two theories have been extraordinarily successful in explaining the fundamental aspects of the physical world, they leave several crucial questions unanswered. Moreover, they are based on distinct interpretations of space and time, rendering them fundamentally incompatible. Despite our possession of two descriptions, we currently believe that we have only ever witnessed one universe. Therefore, the need for a quantum theory of gravity arises. Various approaches have been pursued to formulate such a theory, with one prominent path leading to String Theory, which has enjoyed considerable popularity and has been extensively discussed in the scientific literature. However, String Theory has encountered significant challenges and has faced criticism.

In this book, Jim Baggott presents an alternative approach: an approach that begins with relativity as its foundation and leads to the formation of a structure known as Loop Quantum. By adopting this unconventional path, Baggott offers a fresh perspective on the quest for a quantum theory of gravity. Through his comprehensive and insightful explanations, the book provides readers with a deeper understanding of the complexities involved in this field. It sheds light on the challenges faced by String Theory and presents a viable alternative that has the potential to revolutionize our understanding of space, time, and gravity.

In conclusion, this book is a must-read for anyone interested in the forefront of physics. By combining clear discussions of both quantum theory and general relativity, it offers a comprehensive and accessible exploration of the new quantum theory of space and time. Through its innovative approach, it provides a valuable alternative to String Theory and offers a path toward a deeper understanding of the fundamental nature of the universe.

Weight: 326g
Dimension: 129 x 196 x 29 (mm)
ISBN-13: 9780198809128